./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe021_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/safe021_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/safe021_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe021_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 20:47:00,208 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:47:00,268 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:47:00,272 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:47:00,273 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:47:00,362 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:47:00,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:47:00,362 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:47:00,363 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:47:00,366 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:47:00,366 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:47:00,366 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:47:00,367 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:47:00,368 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:47:00,368 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:47:00,368 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:47:00,369 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:47:00,369 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:47:00,369 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:47:00,369 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:47:00,370 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:47:00,370 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:47:00,371 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:47:00,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:47:00,371 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:47:00,371 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:47:00,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:47:00,372 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:47:00,372 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:47:00,372 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:47:00,373 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:47:00,373 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:47:00,373 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:47:00,374 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:47:00,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:47:00,374 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:47:00,374 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:47:00,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:47:00,375 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:47:00,375 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:47:00,375 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:47:00,375 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:47:00,375 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:47:00,376 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:47:00,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:47:00,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:47:00,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:47:00,629 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:47:00,630 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:47:00,631 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe021_tso.yml/witness.yml [2024-06-03 20:47:00,759 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:47:00,760 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:47:00,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.i [2024-06-03 20:47:01,751 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:47:01,969 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:47:01,972 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.i [2024-06-03 20:47:01,982 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9001c6a4/25fe70db3d3d48178e11d0ddec792a36/FLAGce93c576d [2024-06-03 20:47:01,994 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9001c6a4/25fe70db3d3d48178e11d0ddec792a36 [2024-06-03 20:47:01,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:47:01,996 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:47:01,998 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:47:01,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:47:02,001 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:47:02,002 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:47:00" (1/2) ... [2024-06-03 20:47:02,003 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ade8df and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:47:02, skipping insertion in model container [2024-06-03 20:47:02,003 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:47:00" (1/2) ... [2024-06-03 20:47:02,004 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@110a6e6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:47:02, skipping insertion in model container [2024-06-03 20:47:02,004 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:47:01" (2/2) ... [2024-06-03 20:47:02,004 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ade8df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02, skipping insertion in model container [2024-06-03 20:47:02,005 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:47:01" (2/2) ... [2024-06-03 20:47:02,005 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:47:02,043 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:47:02,043 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && y <= 1) && z <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-03 20:47:02,044 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && y <= 1) && z <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-03 20:47:02,044 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && y <= 1) && z <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-03 20:47:02,044 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:47:02,044 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-03 20:47:02,077 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:47:02,399 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:47:02,408 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:47:02,536 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:47:02,578 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:47:02,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02 WrapperNode [2024-06-03 20:47:02,579 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:47:02,581 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:47:02,581 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:47:02,581 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:47:02,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (1/1) ... [2024-06-03 20:47:02,601 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (1/1) ... [2024-06-03 20:47:02,631 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-03 20:47:02,632 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:47:02,632 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:47:02,632 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:47:02,632 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:47:02,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (1/1) ... [2024-06-03 20:47:02,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (1/1) ... [2024-06-03 20:47:02,646 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (1/1) ... [2024-06-03 20:47:02,659 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 20:47:02,666 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (1/1) ... [2024-06-03 20:47:02,666 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (1/1) ... [2024-06-03 20:47:02,675 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (1/1) ... [2024-06-03 20:47:02,677 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (1/1) ... [2024-06-03 20:47:02,682 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (1/1) ... [2024-06-03 20:47:02,683 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (1/1) ... [2024-06-03 20:47:02,686 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:47:02,690 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:47:02,691 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:47:02,691 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:47:02,692 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (1/1) ... [2024-06-03 20:47:02,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:47:02,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:47:02,714 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 20:47:02,731 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 20:47:02,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:47:02,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:47:02,744 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:47:02,745 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:47:02,745 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:47:02,745 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:47:02,745 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:47:02,745 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:47:02,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:47:02,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:47:02,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:47:02,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:47:02,748 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 20:47:02,867 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:47:02,868 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:47:03,162 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:47:03,164 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:47:03,271 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:47:03,271 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:47:03,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:47:03 BoogieIcfgContainer [2024-06-03 20:47:03,272 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:47:03,273 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:47:03,273 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:47:03,275 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:47:03,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:47:00" (1/4) ... [2024-06-03 20:47:03,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77451704 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:47:03, skipping insertion in model container [2024-06-03 20:47:03,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:47:01" (2/4) ... [2024-06-03 20:47:03,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77451704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:47:03, skipping insertion in model container [2024-06-03 20:47:03,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:02" (3/4) ... [2024-06-03 20:47:03,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77451704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:47:03, skipping insertion in model container [2024-06-03 20:47:03,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:47:03" (4/4) ... [2024-06-03 20:47:03,278 INFO L112 eAbstractionObserver]: Analyzing ICFG safe021_tso.i [2024-06-03 20:47:03,290 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:47:03,291 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:47:03,291 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:47:03,331 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:47:03,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:47:03,382 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 20:47:03,383 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:47:03,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:47:03,384 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:47:03,387 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 20:47:03,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:47:03,402 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;@7012ea52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:47:03,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:47:03,408 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:47:03,408 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:47:03,408 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:47:03,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:03,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:47:03,409 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 20:47:03,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:03,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1782945868, now seen corresponding path program 1 times [2024-06-03 20:47:03,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:03,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773277262] [2024-06-03 20:47:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:04,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:04,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773277262] [2024-06-03 20:47:04,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773277262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:04,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:04,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:47:04,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699591719] [2024-06-03 20:47:04,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:04,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:47:04,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:04,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:47:04,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:47:04,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-03 20:47:04,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:04,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:04,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-03 20:47:04,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:04,293 INFO L124 PetriNetUnfolderBase]: 606/1002 cut-off events. [2024-06-03 20:47:04,294 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-03 20:47:04,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2020 conditions, 1002 events. 606/1002 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4975 event pairs, 384 based on Foata normal form. 1/958 useless extension candidates. Maximal degree in co-relation 2005. Up to 941 conditions per place. [2024-06-03 20:47:04,305 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-03 20:47:04,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-03 20:47:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:47:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:47:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-03 20:47:04,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-03 20:47:04,316 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 82 transitions. [2024-06-03 20:47:04,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-03 20:47:04,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:04,321 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 20:47:04,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-03 20:47:04,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 20:47:04,325 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 20:47:04,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:04,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:04,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:04,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:47:04,326 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 20:47:04,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:04,327 INFO L85 PathProgramCache]: Analyzing trace with hash 280983315, now seen corresponding path program 1 times [2024-06-03 20:47:04,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:04,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897559413] [2024-06-03 20:47:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:04,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:04,637 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 20:47:04,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:04,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897559413] [2024-06-03 20:47:04,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897559413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:04,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:04,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:47:04,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299020450] [2024-06-03 20:47:04,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:04,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:47:04,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:47:04,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:47:04,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:04,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:04,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:04,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:04,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:04,807 INFO L124 PetriNetUnfolderBase]: 767/1269 cut-off events. [2024-06-03 20:47:04,807 INFO L125 PetriNetUnfolderBase]: For 259/307 co-relation queries the response was YES. [2024-06-03 20:47:04,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2890 conditions, 1269 events. 767/1269 cut-off events. For 259/307 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6207 event pairs, 422 based on Foata normal form. 3/1241 useless extension candidates. Maximal degree in co-relation 2875. Up to 1158 conditions per place. [2024-06-03 20:47:04,813 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-03 20:47:04,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 252 flow [2024-06-03 20:47:04,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:47:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:47:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-03 20:47:04,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-03 20:47:04,815 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 104 transitions. [2024-06-03 20:47:04,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 252 flow [2024-06-03 20:47:04,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:47:04,817 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-03 20:47:04,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-03 20:47:04,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-03 20:47:04,818 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-03 20:47:04,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:04,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:04,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:04,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:47:04,818 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:04,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:04,819 INFO L85 PathProgramCache]: Analyzing trace with hash 120548589, now seen corresponding path program 1 times [2024-06-03 20:47:04,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:04,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521689616] [2024-06-03 20:47:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:04,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:04,998 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 20:47:04,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:04,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521689616] [2024-06-03 20:47:04,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521689616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:04,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:04,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:47:05,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063115162] [2024-06-03 20:47:05,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:05,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:47:05,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:47:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:47:05,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:05,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:05,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:05,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:05,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:05,178 INFO L124 PetriNetUnfolderBase]: 775/1315 cut-off events. [2024-06-03 20:47:05,178 INFO L125 PetriNetUnfolderBase]: For 717/720 co-relation queries the response was YES. [2024-06-03 20:47:05,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3318 conditions, 1315 events. 775/1315 cut-off events. For 717/720 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6511 event pairs, 287 based on Foata normal form. 7/1318 useless extension candidates. Maximal degree in co-relation 3300. Up to 1104 conditions per place. [2024-06-03 20:47:05,184 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-03 20:47:05,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 406 flow [2024-06-03 20:47:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-03 20:47:05,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634146341463415 [2024-06-03 20:47:05,187 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 136 transitions. [2024-06-03 20:47:05,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 406 flow [2024-06-03 20:47:05,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 404 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-03 20:47:05,189 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 257 flow [2024-06-03 20:47:05,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-06-03 20:47:05,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-03 20:47:05,190 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 257 flow [2024-06-03 20:47:05,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:05,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:05,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:05,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:47:05,191 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 20:47:05,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:05,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1838225564, now seen corresponding path program 1 times [2024-06-03 20:47:05,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:05,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961904216] [2024-06-03 20:47:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:05,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:05,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:05,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961904216] [2024-06-03 20:47:05,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961904216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:05,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:05,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:05,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923747983] [2024-06-03 20:47:05,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:05,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:05,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:05,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:05,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:05,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:05,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 257 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:05,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:05,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:05,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:05,664 INFO L124 PetriNetUnfolderBase]: 787/1333 cut-off events. [2024-06-03 20:47:05,665 INFO L125 PetriNetUnfolderBase]: For 1671/1684 co-relation queries the response was YES. [2024-06-03 20:47:05,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4045 conditions, 1333 events. 787/1333 cut-off events. For 1671/1684 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6637 event pairs, 187 based on Foata normal form. 14/1343 useless extension candidates. Maximal degree in co-relation 4022. Up to 1072 conditions per place. [2024-06-03 20:47:05,672 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-03 20:47:05,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 519 flow [2024-06-03 20:47:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-03 20:47:05,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-03 20:47:05,674 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 257 flow. Second operand 6 states and 157 transitions. [2024-06-03 20:47:05,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 519 flow [2024-06-03 20:47:05,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 509 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-03 20:47:05,681 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 309 flow [2024-06-03 20:47:05,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-03 20:47:05,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-03 20:47:05,682 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 309 flow [2024-06-03 20:47:05,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:05,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:05,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:05,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:47:05,683 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 20:47:05,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash -214679612, now seen corresponding path program 1 times [2024-06-03 20:47:05,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:05,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651162260] [2024-06-03 20:47:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:05,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:06,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:06,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651162260] [2024-06-03 20:47:06,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651162260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:06,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:06,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:47:06,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110260866] [2024-06-03 20:47:06,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:06,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:47:06,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:06,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:47:06,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:47:06,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-03 20:47:06,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 309 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 20:47:06,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:06,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-03 20:47:06,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:06,216 INFO L124 PetriNetUnfolderBase]: 716/1209 cut-off events. [2024-06-03 20:47:06,216 INFO L125 PetriNetUnfolderBase]: For 2280/2291 co-relation queries the response was YES. [2024-06-03 20:47:06,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4012 conditions, 1209 events. 716/1209 cut-off events. For 2280/2291 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6029 event pairs, 247 based on Foata normal form. 3/1176 useless extension candidates. Maximal degree in co-relation 3986. Up to 1055 conditions per place. [2024-06-03 20:47:06,226 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 43 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-03 20:47:06,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 461 flow [2024-06-03 20:47:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:47:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:47:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-03 20:47:06,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-03 20:47:06,229 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 309 flow. Second operand 4 states and 102 transitions. [2024-06-03 20:47:06,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 461 flow [2024-06-03 20:47:06,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 417 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:06,236 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 320 flow [2024-06-03 20:47:06,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-03 20:47:06,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-03 20:47:06,240 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 320 flow [2024-06-03 20:47:06,240 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 20:47:06,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:06,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:06,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:47:06,245 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 20:47:06,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:06,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1934089472, now seen corresponding path program 1 times [2024-06-03 20:47:06,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:06,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467833442] [2024-06-03 20:47:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:06,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:06,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:06,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467833442] [2024-06-03 20:47:06,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467833442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:06,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:06,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:47:06,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397442931] [2024-06-03 20:47:06,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:06,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:47:06,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:06,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:47:06,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:47:06,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:06,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 320 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 20:47:06,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:06,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:06,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:06,759 INFO L124 PetriNetUnfolderBase]: 875/1473 cut-off events. [2024-06-03 20:47:06,759 INFO L125 PetriNetUnfolderBase]: For 3500/3518 co-relation queries the response was YES. [2024-06-03 20:47:06,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5007 conditions, 1473 events. 875/1473 cut-off events. For 3500/3518 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7511 event pairs, 318 based on Foata normal form. 2/1449 useless extension candidates. Maximal degree in co-relation 4980. Up to 1281 conditions per place. [2024-06-03 20:47:06,769 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 58 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2024-06-03 20:47:06,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 553 flow [2024-06-03 20:47:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-03 20:47:06,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:47:06,770 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 320 flow. Second operand 5 states and 120 transitions. [2024-06-03 20:47:06,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 553 flow [2024-06-03 20:47:06,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 81 transitions, 523 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:06,774 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 399 flow [2024-06-03 20:47:06,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2024-06-03 20:47:06,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-03 20:47:06,775 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 399 flow [2024-06-03 20:47:06,775 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 20:47:06,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:06,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:06,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:47:06,776 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 20:47:06,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash -898835455, now seen corresponding path program 1 times [2024-06-03 20:47:06,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:06,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617885863] [2024-06-03 20:47:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:06,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:07,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:07,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617885863] [2024-06-03 20:47:07,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617885863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:07,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:07,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:47:07,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345953246] [2024-06-03 20:47:07,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:07,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:47:07,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:07,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:47:07,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:47:07,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:07,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 399 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 20:47:07,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:07,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:07,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:07,338 INFO L124 PetriNetUnfolderBase]: 875/1447 cut-off events. [2024-06-03 20:47:07,338 INFO L125 PetriNetUnfolderBase]: For 3885/3906 co-relation queries the response was YES. [2024-06-03 20:47:07,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5329 conditions, 1447 events. 875/1447 cut-off events. For 3885/3906 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7200 event pairs, 295 based on Foata normal form. 10/1445 useless extension candidates. Maximal degree in co-relation 5299. Up to 1240 conditions per place. [2024-06-03 20:47:07,349 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 21 changer transitions 0/89 dead transitions. [2024-06-03 20:47:07,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 651 flow [2024-06-03 20:47:07,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:07,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-03 20:47:07,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-03 20:47:07,350 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 399 flow. Second operand 5 states and 129 transitions. [2024-06-03 20:47:07,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 651 flow [2024-06-03 20:47:07,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 645 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-03 20:47:07,355 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 467 flow [2024-06-03 20:47:07,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=467, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-03 20:47:07,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-03 20:47:07,356 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 467 flow [2024-06-03 20:47:07,356 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 20:47:07,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:07,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:07,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:47:07,356 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 20:47:07,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:07,357 INFO L85 PathProgramCache]: Analyzing trace with hash -148644445, now seen corresponding path program 2 times [2024-06-03 20:47:07,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:07,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741694799] [2024-06-03 20:47:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:07,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:07,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:07,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741694799] [2024-06-03 20:47:07,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741694799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:07,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:07,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:47:07,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771359439] [2024-06-03 20:47:07,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:07,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:47:07,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:07,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:47:07,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:47:07,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:07,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 467 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 20:47:07,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:07,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:07,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:07,826 INFO L124 PetriNetUnfolderBase]: 885/1459 cut-off events. [2024-06-03 20:47:07,826 INFO L125 PetriNetUnfolderBase]: For 4833/4864 co-relation queries the response was YES. [2024-06-03 20:47:07,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5633 conditions, 1459 events. 885/1459 cut-off events. For 4833/4864 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7241 event pairs, 304 based on Foata normal form. 22/1468 useless extension candidates. Maximal degree in co-relation 5600. Up to 1255 conditions per place. [2024-06-03 20:47:07,835 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 52 selfloop transitions, 22 changer transitions 0/84 dead transitions. [2024-06-03 20:47:07,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 653 flow [2024-06-03 20:47:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:07,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-03 20:47:07,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:47:07,838 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 467 flow. Second operand 5 states and 125 transitions. [2024-06-03 20:47:07,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 653 flow [2024-06-03 20:47:07,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 84 transitions, 626 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:07,843 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 493 flow [2024-06-03 20:47:07,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=493, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-03 20:47:07,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-03 20:47:07,844 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 493 flow [2024-06-03 20:47:07,844 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 20:47:07,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:07,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:07,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:47:07,845 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 20:47:07,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:07,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2101371457, now seen corresponding path program 1 times [2024-06-03 20:47:07,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:07,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049180787] [2024-06-03 20:47:07,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:07,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:08,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:08,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049180787] [2024-06-03 20:47:08,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049180787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:08,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:08,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:08,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642612885] [2024-06-03 20:47:08,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:08,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:08,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:08,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:08,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 493 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:08,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:08,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:08,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:08,297 INFO L124 PetriNetUnfolderBase]: 955/1556 cut-off events. [2024-06-03 20:47:08,297 INFO L125 PetriNetUnfolderBase]: For 6049/6049 co-relation queries the response was YES. [2024-06-03 20:47:08,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6082 conditions, 1556 events. 955/1556 cut-off events. For 6049/6049 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7591 event pairs, 306 based on Foata normal form. 4/1556 useless extension candidates. Maximal degree in co-relation 6048. Up to 1302 conditions per place. [2024-06-03 20:47:08,308 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 84 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-03 20:47:08,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 936 flow [2024-06-03 20:47:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:47:08,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-03 20:47:08,310 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 493 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:47:08,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 936 flow [2024-06-03 20:47:08,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 838 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:08,318 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 593 flow [2024-06-03 20:47:08,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=593, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-03 20:47:08,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-03 20:47:08,319 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 593 flow [2024-06-03 20:47:08,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:08,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:08,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:08,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:47:08,320 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 20:47:08,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash 422211897, now seen corresponding path program 2 times [2024-06-03 20:47:08,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:08,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857273950] [2024-06-03 20:47:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:08,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:08,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:08,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857273950] [2024-06-03 20:47:08,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857273950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:08,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:08,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:08,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259830946] [2024-06-03 20:47:08,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:08,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:08,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:08,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:08,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:08,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:08,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 593 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:08,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:08,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:08,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:08,788 INFO L124 PetriNetUnfolderBase]: 966/1573 cut-off events. [2024-06-03 20:47:08,788 INFO L125 PetriNetUnfolderBase]: For 7351/7351 co-relation queries the response was YES. [2024-06-03 20:47:08,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6618 conditions, 1573 events. 966/1573 cut-off events. For 7351/7351 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7662 event pairs, 320 based on Foata normal form. 2/1570 useless extension candidates. Maximal degree in co-relation 6582. Up to 1309 conditions per place. [2024-06-03 20:47:08,800 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 80 selfloop transitions, 31 changer transitions 0/117 dead transitions. [2024-06-03 20:47:08,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 1019 flow [2024-06-03 20:47:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:47:08,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-03 20:47:08,815 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 593 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:47:08,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 1019 flow [2024-06-03 20:47:08,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 981 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:08,827 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 707 flow [2024-06-03 20:47:08,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=707, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2024-06-03 20:47:08,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-03 20:47:08,829 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 707 flow [2024-06-03 20:47:08,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:08,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:08,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:08,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:47:08,830 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 20:47:08,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:08,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1061061247, now seen corresponding path program 3 times [2024-06-03 20:47:08,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:08,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255507796] [2024-06-03 20:47:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:08,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:09,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:09,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255507796] [2024-06-03 20:47:09,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255507796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:09,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:09,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:09,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296386621] [2024-06-03 20:47:09,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:09,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:09,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:09,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:09,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:09,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:09,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 707 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:09,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:09,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:09,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:09,358 INFO L124 PetriNetUnfolderBase]: 961/1563 cut-off events. [2024-06-03 20:47:09,358 INFO L125 PetriNetUnfolderBase]: For 8728/8728 co-relation queries the response was YES. [2024-06-03 20:47:09,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6846 conditions, 1563 events. 961/1563 cut-off events. For 8728/8728 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7619 event pairs, 320 based on Foata normal form. 2/1559 useless extension candidates. Maximal degree in co-relation 6808. Up to 1306 conditions per place. [2024-06-03 20:47:09,370 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 79 selfloop transitions, 30 changer transitions 0/115 dead transitions. [2024-06-03 20:47:09,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 115 transitions, 1029 flow [2024-06-03 20:47:09,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 20:47:09,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-03 20:47:09,371 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 707 flow. Second operand 6 states and 146 transitions. [2024-06-03 20:47:09,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 115 transitions, 1029 flow [2024-06-03 20:47:09,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 115 transitions, 1017 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-03 20:47:09,383 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 763 flow [2024-06-03 20:47:09,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=763, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2024-06-03 20:47:09,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-03 20:47:09,383 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 763 flow [2024-06-03 20:47:09,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:09,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:09,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:09,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:47:09,384 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 20:47:09,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:09,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1916716469, now seen corresponding path program 1 times [2024-06-03 20:47:09,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:09,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078469308] [2024-06-03 20:47:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:09,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:09,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:09,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078469308] [2024-06-03 20:47:09,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078469308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:09,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:09,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:09,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488939619] [2024-06-03 20:47:09,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:09,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:09,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:09,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:09,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:09,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:09,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 763 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 20:47:09,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:09,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:09,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:09,865 INFO L124 PetriNetUnfolderBase]: 886/1489 cut-off events. [2024-06-03 20:47:09,865 INFO L125 PetriNetUnfolderBase]: For 10182/10182 co-relation queries the response was YES. [2024-06-03 20:47:09,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6739 conditions, 1489 events. 886/1489 cut-off events. For 10182/10182 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7467 event pairs, 262 based on Foata normal form. 4/1492 useless extension candidates. Maximal degree in co-relation 6698. Up to 1267 conditions per place. [2024-06-03 20:47:09,879 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 88 selfloop transitions, 12 changer transitions 0/114 dead transitions. [2024-06-03 20:47:09,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 114 transitions, 1027 flow [2024-06-03 20:47:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 20:47:09,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 20:47:09,881 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 763 flow. Second operand 6 states and 141 transitions. [2024-06-03 20:47:09,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 114 transitions, 1027 flow [2024-06-03 20:47:09,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 114 transitions, 962 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:09,894 INFO L231 Difference]: Finished difference. Result has 87 places, 94 transitions, 747 flow [2024-06-03 20:47:09,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=747, PETRI_PLACES=87, PETRI_TRANSITIONS=94} [2024-06-03 20:47:09,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-03 20:47:09,895 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 94 transitions, 747 flow [2024-06-03 20:47:09,895 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 20:47:09,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:09,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:09,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:47:09,896 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 20:47:09,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:09,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1267538997, now seen corresponding path program 1 times [2024-06-03 20:47:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:09,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721637366] [2024-06-03 20:47:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:10,175 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 20:47:10,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:10,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721637366] [2024-06-03 20:47:10,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721637366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:10,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:10,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:10,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519274835] [2024-06-03 20:47:10,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:10,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:10,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:10,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:10,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:10,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:10,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 94 transitions, 747 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:10,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:10,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:10,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:10,401 INFO L124 PetriNetUnfolderBase]: 980/1605 cut-off events. [2024-06-03 20:47:10,401 INFO L125 PetriNetUnfolderBase]: For 11455/11455 co-relation queries the response was YES. [2024-06-03 20:47:10,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7358 conditions, 1605 events. 980/1605 cut-off events. For 11455/11455 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7912 event pairs, 302 based on Foata normal form. 2/1603 useless extension candidates. Maximal degree in co-relation 7316. Up to 1323 conditions per place. [2024-06-03 20:47:10,412 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 89 selfloop transitions, 33 changer transitions 0/128 dead transitions. [2024-06-03 20:47:10,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 128 transitions, 1213 flow [2024-06-03 20:47:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:47:10,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-03 20:47:10,414 INFO L175 Difference]: Start difference. First operand has 87 places, 94 transitions, 747 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:47:10,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 128 transitions, 1213 flow [2024-06-03 20:47:10,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 128 transitions, 1182 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:10,430 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 863 flow [2024-06-03 20:47:10,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=863, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2024-06-03 20:47:10,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-03 20:47:10,432 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 863 flow [2024-06-03 20:47:10,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:10,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:10,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:10,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:47:10,432 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 20:47:10,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:10,433 INFO L85 PathProgramCache]: Analyzing trace with hash -492411141, now seen corresponding path program 2 times [2024-06-03 20:47:10,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:10,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570301787] [2024-06-03 20:47:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:10,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:10,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:10,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570301787] [2024-06-03 20:47:10,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570301787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:10,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:10,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:10,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922523396] [2024-06-03 20:47:10,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:10,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:10,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:10,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:10,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:10,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:10,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 101 transitions, 863 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:10,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:10,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:10,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:10,909 INFO L124 PetriNetUnfolderBase]: 975/1598 cut-off events. [2024-06-03 20:47:10,909 INFO L125 PetriNetUnfolderBase]: For 12945/12945 co-relation queries the response was YES. [2024-06-03 20:47:10,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7578 conditions, 1598 events. 975/1598 cut-off events. For 12945/12945 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7907 event pairs, 302 based on Foata normal form. 2/1596 useless extension candidates. Maximal degree in co-relation 7534. Up to 1318 conditions per place. [2024-06-03 20:47:10,921 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 87 selfloop transitions, 37 changer transitions 0/130 dead transitions. [2024-06-03 20:47:10,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 130 transitions, 1248 flow [2024-06-03 20:47:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:10,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 20:47:10,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-03 20:47:10,922 INFO L175 Difference]: Start difference. First operand has 90 places, 101 transitions, 863 flow. Second operand 6 states and 151 transitions. [2024-06-03 20:47:10,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 130 transitions, 1248 flow [2024-06-03 20:47:10,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 130 transitions, 1206 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:10,943 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 943 flow [2024-06-03 20:47:10,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=943, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-06-03 20:47:10,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-03 20:47:10,944 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 943 flow [2024-06-03 20:47:10,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:10,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:10,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:10,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:47:10,945 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:10,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:10,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1105999029, now seen corresponding path program 3 times [2024-06-03 20:47:10,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:10,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336845368] [2024-06-03 20:47:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:10,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:11,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:11,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336845368] [2024-06-03 20:47:11,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336845368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:11,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:11,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:11,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409889791] [2024-06-03 20:47:11,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:11,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:11,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:11,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:11,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:11,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:11,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 943 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:11,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:11,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:11,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:11,430 INFO L124 PetriNetUnfolderBase]: 970/1594 cut-off events. [2024-06-03 20:47:11,431 INFO L125 PetriNetUnfolderBase]: For 15340/15343 co-relation queries the response was YES. [2024-06-03 20:47:11,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7762 conditions, 1594 events. 970/1594 cut-off events. For 15340/15343 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7920 event pairs, 328 based on Foata normal form. 4/1590 useless extension candidates. Maximal degree in co-relation 7716. Up to 1313 conditions per place. [2024-06-03 20:47:11,443 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 84 selfloop transitions, 33 changer transitions 0/123 dead transitions. [2024-06-03 20:47:11,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 123 transitions, 1236 flow [2024-06-03 20:47:11,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 20:47:11,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 20:47:11,444 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 943 flow. Second operand 6 states and 141 transitions. [2024-06-03 20:47:11,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 123 transitions, 1236 flow [2024-06-03 20:47:11,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 123 transitions, 1186 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:11,461 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 978 flow [2024-06-03 20:47:11,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=978, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2024-06-03 20:47:11,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-03 20:47:11,463 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 978 flow [2024-06-03 20:47:11,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:11,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:11,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:11,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:47:11,464 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 20:47:11,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash -130792418, now seen corresponding path program 1 times [2024-06-03 20:47:11,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:11,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690526789] [2024-06-03 20:47:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:11,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:11,721 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 20:47:11,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:11,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690526789] [2024-06-03 20:47:11,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690526789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:11,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:11,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:11,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499374947] [2024-06-03 20:47:11,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:11,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:11,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:11,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:11,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:11,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:11,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 978 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:11,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:11,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:11,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:11,982 INFO L124 PetriNetUnfolderBase]: 942/1563 cut-off events. [2024-06-03 20:47:11,982 INFO L125 PetriNetUnfolderBase]: For 18113/18121 co-relation queries the response was YES. [2024-06-03 20:47:11,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7879 conditions, 1563 events. 942/1563 cut-off events. For 18113/18121 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7936 event pairs, 168 based on Foata normal form. 10/1525 useless extension candidates. Maximal degree in co-relation 7832. Up to 1184 conditions per place. [2024-06-03 20:47:11,995 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 83 selfloop transitions, 30 changer transitions 0/134 dead transitions. [2024-06-03 20:47:11,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 134 transitions, 1356 flow [2024-06-03 20:47:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 20:47:11,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:47:11,997 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 978 flow. Second operand 6 states and 150 transitions. [2024-06-03 20:47:11,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 134 transitions, 1356 flow [2024-06-03 20:47:12,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 134 transitions, 1305 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:12,018 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 1026 flow [2024-06-03 20:47:12,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1026, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2024-06-03 20:47:12,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-03 20:47:12,020 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 1026 flow [2024-06-03 20:47:12,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:12,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:12,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:12,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:47:12,021 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 20:47:12,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:12,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1799828976, now seen corresponding path program 2 times [2024-06-03 20:47:12,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:12,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484491894] [2024-06-03 20:47:12,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:12,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:12,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:12,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484491894] [2024-06-03 20:47:12,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484491894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:12,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:12,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:12,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247764541] [2024-06-03 20:47:12,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:12,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:12,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:12,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:12,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:12,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:12,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 1026 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:12,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:12,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:12,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:12,551 INFO L124 PetriNetUnfolderBase]: 930/1543 cut-off events. [2024-06-03 20:47:12,551 INFO L125 PetriNetUnfolderBase]: For 20066/20081 co-relation queries the response was YES. [2024-06-03 20:47:12,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7967 conditions, 1543 events. 930/1543 cut-off events. For 20066/20081 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7803 event pairs, 235 based on Foata normal form. 8/1502 useless extension candidates. Maximal degree in co-relation 7918. Up to 1252 conditions per place. [2024-06-03 20:47:12,565 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 79 selfloop transitions, 31 changer transitions 0/131 dead transitions. [2024-06-03 20:47:12,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 131 transitions, 1304 flow [2024-06-03 20:47:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:12,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:12,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:47:12,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-03 20:47:12,566 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 1026 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:47:12,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 131 transitions, 1304 flow [2024-06-03 20:47:12,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 131 transitions, 1261 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:12,588 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 1053 flow [2024-06-03 20:47:12,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1053, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2024-06-03 20:47:12,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-03 20:47:12,589 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 1053 flow [2024-06-03 20:47:12,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:12,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:12,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:12,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:47:12,590 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 20:47:12,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:12,590 INFO L85 PathProgramCache]: Analyzing trace with hash -631058998, now seen corresponding path program 1 times [2024-06-03 20:47:12,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:12,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492392027] [2024-06-03 20:47:12,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:12,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:12,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:12,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492392027] [2024-06-03 20:47:12,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492392027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:12,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:12,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:12,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147755672] [2024-06-03 20:47:12,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:12,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:12,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:12,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:12,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:12,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:12,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 1053 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:12,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:12,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:12,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:13,141 INFO L124 PetriNetUnfolderBase]: 1057/1736 cut-off events. [2024-06-03 20:47:13,142 INFO L125 PetriNetUnfolderBase]: For 22650/22650 co-relation queries the response was YES. [2024-06-03 20:47:13,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8666 conditions, 1736 events. 1057/1736 cut-off events. For 22650/22650 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8797 event pairs, 275 based on Foata normal form. 20/1752 useless extension candidates. Maximal degree in co-relation 8615. Up to 1348 conditions per place. [2024-06-03 20:47:13,155 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 37 changer transitions 0/140 dead transitions. [2024-06-03 20:47:13,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 140 transitions, 1419 flow [2024-06-03 20:47:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:47:13,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-03 20:47:13,157 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 1053 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:47:13,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 140 transitions, 1419 flow [2024-06-03 20:47:13,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 140 transitions, 1348 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:13,181 INFO L231 Difference]: Finished difference. Result has 107 places, 110 transitions, 1084 flow [2024-06-03 20:47:13,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1084, PETRI_PLACES=107, PETRI_TRANSITIONS=110} [2024-06-03 20:47:13,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-03 20:47:13,182 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 1084 flow [2024-06-03 20:47:13,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:13,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:13,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:13,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:47:13,183 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 20:47:13,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:13,183 INFO L85 PathProgramCache]: Analyzing trace with hash 73776520, now seen corresponding path program 2 times [2024-06-03 20:47:13,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:13,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18224110] [2024-06-03 20:47:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:13,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:13,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:13,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18224110] [2024-06-03 20:47:13,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18224110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:13,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:13,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:13,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999123829] [2024-06-03 20:47:13,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:13,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:13,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:13,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:13,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:13,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:13,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 1084 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:13,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:13,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:13,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:13,716 INFO L124 PetriNetUnfolderBase]: 1074/1753 cut-off events. [2024-06-03 20:47:13,717 INFO L125 PetriNetUnfolderBase]: For 22920/22920 co-relation queries the response was YES. [2024-06-03 20:47:13,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9051 conditions, 1753 events. 1074/1753 cut-off events. For 22920/22920 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8787 event pairs, 301 based on Foata normal form. 4/1750 useless extension candidates. Maximal degree in co-relation 8999. Up to 1467 conditions per place. [2024-06-03 20:47:13,730 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 89 selfloop transitions, 41 changer transitions 0/136 dead transitions. [2024-06-03 20:47:13,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 136 transitions, 1424 flow [2024-06-03 20:47:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:47:13,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:47:13,734 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 1084 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:47:13,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 136 transitions, 1424 flow [2024-06-03 20:47:13,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 136 transitions, 1344 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:13,760 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 1117 flow [2024-06-03 20:47:13,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1117, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-06-03 20:47:13,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-03 20:47:13,761 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 1117 flow [2024-06-03 20:47:13,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:13,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:13,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:13,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:47:13,761 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 20:47:13,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:13,762 INFO L85 PathProgramCache]: Analyzing trace with hash 340003724, now seen corresponding path program 3 times [2024-06-03 20:47:13,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:13,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887655218] [2024-06-03 20:47:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:13,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:14,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:14,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887655218] [2024-06-03 20:47:14,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887655218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:14,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:14,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:14,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520382349] [2024-06-03 20:47:14,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:14,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:14,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:14,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:14,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:14,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:14,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 1117 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:14,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:14,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:14,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:14,320 INFO L124 PetriNetUnfolderBase]: 1091/1780 cut-off events. [2024-06-03 20:47:14,321 INFO L125 PetriNetUnfolderBase]: For 25266/25266 co-relation queries the response was YES. [2024-06-03 20:47:14,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9378 conditions, 1780 events. 1091/1780 cut-off events. For 25266/25266 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8949 event pairs, 306 based on Foata normal form. 4/1777 useless extension candidates. Maximal degree in co-relation 9325. Up to 1494 conditions per place. [2024-06-03 20:47:14,335 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 40 changer transitions 0/138 dead transitions. [2024-06-03 20:47:14,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 138 transitions, 1465 flow [2024-06-03 20:47:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:47:14,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:47:14,337 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 1117 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:47:14,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 138 transitions, 1465 flow [2024-06-03 20:47:14,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 138 transitions, 1370 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:14,365 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 1137 flow [2024-06-03 20:47:14,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1137, PETRI_PLACES=111, PETRI_TRANSITIONS=114} [2024-06-03 20:47:14,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-03 20:47:14,366 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 1137 flow [2024-06-03 20:47:14,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:14,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:14,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:14,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:47:14,367 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 20:47:14,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1536095778, now seen corresponding path program 4 times [2024-06-03 20:47:14,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:14,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032730721] [2024-06-03 20:47:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:14,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:14,637 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 20:47:14,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:14,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032730721] [2024-06-03 20:47:14,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032730721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:14,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:14,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:14,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840727904] [2024-06-03 20:47:14,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:14,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:14,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:14,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:14,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:14,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 114 transitions, 1137 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:14,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:14,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:14,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:14,964 INFO L124 PetriNetUnfolderBase]: 1083/1768 cut-off events. [2024-06-03 20:47:14,964 INFO L125 PetriNetUnfolderBase]: For 27028/27028 co-relation queries the response was YES. [2024-06-03 20:47:14,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9406 conditions, 1768 events. 1083/1768 cut-off events. For 27028/27028 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8866 event pairs, 263 based on Foata normal form. 4/1765 useless extension candidates. Maximal degree in co-relation 9352. Up to 1313 conditions per place. [2024-06-03 20:47:14,979 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 90 selfloop transitions, 48 changer transitions 0/144 dead transitions. [2024-06-03 20:47:14,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 144 transitions, 1517 flow [2024-06-03 20:47:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:47:14,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:47:14,981 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 1137 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:47:14,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 144 transitions, 1517 flow [2024-06-03 20:47:15,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 144 transitions, 1420 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:15,013 INFO L231 Difference]: Finished difference. Result has 113 places, 116 transitions, 1175 flow [2024-06-03 20:47:15,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1175, PETRI_PLACES=113, PETRI_TRANSITIONS=116} [2024-06-03 20:47:15,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-03 20:47:15,013 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 116 transitions, 1175 flow [2024-06-03 20:47:15,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:15,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:15,014 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 20:47:15,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:47:15,014 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 20:47:15,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:15,015 INFO L85 PathProgramCache]: Analyzing trace with hash 240403600, now seen corresponding path program 1 times [2024-06-03 20:47:15,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:15,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666858695] [2024-06-03 20:47:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:15,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:15,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:15,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666858695] [2024-06-03 20:47:15,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666858695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:15,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:15,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:15,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091439197] [2024-06-03 20:47:15,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:15,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:15,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:15,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:15,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:15,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:15,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 1175 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:15,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:15,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:15,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:15,577 INFO L124 PetriNetUnfolderBase]: 1185/1964 cut-off events. [2024-06-03 20:47:15,577 INFO L125 PetriNetUnfolderBase]: For 34080/34080 co-relation queries the response was YES. [2024-06-03 20:47:15,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10499 conditions, 1964 events. 1185/1964 cut-off events. For 34080/34080 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10346 event pairs, 218 based on Foata normal form. 12/1972 useless extension candidates. Maximal degree in co-relation 10444. Up to 1172 conditions per place. [2024-06-03 20:47:15,613 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 115 selfloop transitions, 38 changer transitions 0/159 dead transitions. [2024-06-03 20:47:15,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 159 transitions, 1726 flow [2024-06-03 20:47:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:15,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 20:47:15,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-03 20:47:15,616 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 1175 flow. Second operand 7 states and 172 transitions. [2024-06-03 20:47:15,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 159 transitions, 1726 flow [2024-06-03 20:47:15,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 159 transitions, 1609 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:15,653 INFO L231 Difference]: Finished difference. Result has 117 places, 121 transitions, 1219 flow [2024-06-03 20:47:15,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1219, PETRI_PLACES=117, PETRI_TRANSITIONS=121} [2024-06-03 20:47:15,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-03 20:47:15,654 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 121 transitions, 1219 flow [2024-06-03 20:47:15,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:15,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:15,655 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 20:47:15,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:47:15,655 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 20:47:15,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1667743104, now seen corresponding path program 2 times [2024-06-03 20:47:15,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:15,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533927718] [2024-06-03 20:47:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:15,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:15,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:15,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533927718] [2024-06-03 20:47:15,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533927718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:15,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:15,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:15,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666141351] [2024-06-03 20:47:15,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:15,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:15,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:15,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:15,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:15,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:15,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 121 transitions, 1219 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:15,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:15,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:15,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:16,242 INFO L124 PetriNetUnfolderBase]: 1226/2053 cut-off events. [2024-06-03 20:47:16,242 INFO L125 PetriNetUnfolderBase]: For 37341/37341 co-relation queries the response was YES. [2024-06-03 20:47:16,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10924 conditions, 2053 events. 1226/2053 cut-off events. For 37341/37341 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11008 event pairs, 306 based on Foata normal form. 12/2061 useless extension candidates. Maximal degree in co-relation 10866. Up to 1548 conditions per place. [2024-06-03 20:47:16,257 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 112 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-03 20:47:16,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 157 transitions, 1652 flow [2024-06-03 20:47:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:47:16,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:47:16,259 INFO L175 Difference]: Start difference. First operand has 117 places, 121 transitions, 1219 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:47:16,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 157 transitions, 1652 flow [2024-06-03 20:47:16,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 157 transitions, 1597 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:16,310 INFO L231 Difference]: Finished difference. Result has 123 places, 124 transitions, 1298 flow [2024-06-03 20:47:16,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1298, PETRI_PLACES=123, PETRI_TRANSITIONS=124} [2024-06-03 20:47:16,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-03 20:47:16,311 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 124 transitions, 1298 flow [2024-06-03 20:47:16,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:16,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:16,311 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 20:47:16,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:47:16,312 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 20:47:16,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:16,312 INFO L85 PathProgramCache]: Analyzing trace with hash -760816356, now seen corresponding path program 3 times [2024-06-03 20:47:16,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:16,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424614498] [2024-06-03 20:47:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:16,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:16,548 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 20:47:16,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:16,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424614498] [2024-06-03 20:47:16,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424614498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:16,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:16,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:16,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94722511] [2024-06-03 20:47:16,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:16,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:16,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:16,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:16,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:16,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:16,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 124 transitions, 1298 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:16,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:16,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:16,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:16,902 INFO L124 PetriNetUnfolderBase]: 1328/2237 cut-off events. [2024-06-03 20:47:16,903 INFO L125 PetriNetUnfolderBase]: For 44822/44822 co-relation queries the response was YES. [2024-06-03 20:47:16,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12213 conditions, 2237 events. 1328/2237 cut-off events. For 44822/44822 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12341 event pairs, 271 based on Foata normal form. 12/2245 useless extension candidates. Maximal degree in co-relation 12152. Up to 1654 conditions per place. [2024-06-03 20:47:16,920 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 41 changer transitions 0/165 dead transitions. [2024-06-03 20:47:16,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 165 transitions, 1855 flow [2024-06-03 20:47:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:47:16,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-03 20:47:16,922 INFO L175 Difference]: Start difference. First operand has 123 places, 124 transitions, 1298 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:47:16,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 165 transitions, 1855 flow [2024-06-03 20:47:16,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 165 transitions, 1796 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:16,979 INFO L231 Difference]: Finished difference. Result has 128 places, 127 transitions, 1384 flow [2024-06-03 20:47:16,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1384, PETRI_PLACES=128, PETRI_TRANSITIONS=127} [2024-06-03 20:47:16,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-03 20:47:16,980 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 127 transitions, 1384 flow [2024-06-03 20:47:16,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:16,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:16,980 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 20:47:16,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:47:16,980 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 20:47:16,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:16,981 INFO L85 PathProgramCache]: Analyzing trace with hash -760812636, now seen corresponding path program 4 times [2024-06-03 20:47:16,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:16,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810598080] [2024-06-03 20:47:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:16,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:17,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:17,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810598080] [2024-06-03 20:47:17,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810598080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:17,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:17,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:17,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766232653] [2024-06-03 20:47:17,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:17,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:17,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:17,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:17,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:17,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:17,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 127 transitions, 1384 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:17,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:17,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:17,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:17,555 INFO L124 PetriNetUnfolderBase]: 1386/2335 cut-off events. [2024-06-03 20:47:17,556 INFO L125 PetriNetUnfolderBase]: For 50249/50249 co-relation queries the response was YES. [2024-06-03 20:47:17,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12974 conditions, 2335 events. 1386/2335 cut-off events. For 50249/50249 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13099 event pairs, 376 based on Foata normal form. 16/2347 useless extension candidates. Maximal degree in co-relation 12910. Up to 1925 conditions per place. [2024-06-03 20:47:17,573 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 116 selfloop transitions, 39 changer transitions 0/161 dead transitions. [2024-06-03 20:47:17,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 161 transitions, 1806 flow [2024-06-03 20:47:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:47:17,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:47:17,575 INFO L175 Difference]: Start difference. First operand has 128 places, 127 transitions, 1384 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:47:17,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 161 transitions, 1806 flow [2024-06-03 20:47:17,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 161 transitions, 1743 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:17,636 INFO L231 Difference]: Finished difference. Result has 132 places, 128 transitions, 1430 flow [2024-06-03 20:47:17,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1430, PETRI_PLACES=132, PETRI_TRANSITIONS=128} [2024-06-03 20:47:17,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-03 20:47:17,637 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 128 transitions, 1430 flow [2024-06-03 20:47:17,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:17,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:17,638 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 20:47:17,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:47:17,638 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 20:47:17,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:17,638 INFO L85 PathProgramCache]: Analyzing trace with hash -755306106, now seen corresponding path program 5 times [2024-06-03 20:47:17,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:17,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203889609] [2024-06-03 20:47:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:17,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:17,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:17,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203889609] [2024-06-03 20:47:17,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203889609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:17,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:17,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:17,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937670786] [2024-06-03 20:47:17,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:17,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:17,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:17,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:17,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:17,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:17,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 128 transitions, 1430 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:17,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:17,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:17,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:18,292 INFO L124 PetriNetUnfolderBase]: 1444/2433 cut-off events. [2024-06-03 20:47:18,293 INFO L125 PetriNetUnfolderBase]: For 54096/54096 co-relation queries the response was YES. [2024-06-03 20:47:18,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13591 conditions, 2433 events. 1444/2433 cut-off events. For 54096/54096 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13872 event pairs, 386 based on Foata normal form. 16/2445 useless extension candidates. Maximal degree in co-relation 13525. Up to 2023 conditions per place. [2024-06-03 20:47:18,310 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 117 selfloop transitions, 36 changer transitions 0/159 dead transitions. [2024-06-03 20:47:18,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 159 transitions, 1840 flow [2024-06-03 20:47:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:47:18,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-03 20:47:18,312 INFO L175 Difference]: Start difference. First operand has 132 places, 128 transitions, 1430 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:47:18,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 159 transitions, 1840 flow [2024-06-03 20:47:18,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 159 transitions, 1755 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:18,380 INFO L231 Difference]: Finished difference. Result has 134 places, 129 transitions, 1448 flow [2024-06-03 20:47:18,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1448, PETRI_PLACES=134, PETRI_TRANSITIONS=129} [2024-06-03 20:47:18,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-03 20:47:18,381 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 129 transitions, 1448 flow [2024-06-03 20:47:18,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:18,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:18,381 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 20:47:18,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:47:18,382 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 20:47:18,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:18,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1912008618, now seen corresponding path program 1 times [2024-06-03 20:47:18,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:18,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562396719] [2024-06-03 20:47:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:18,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:18,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:18,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562396719] [2024-06-03 20:47:18,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562396719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:18,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:18,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:18,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455820208] [2024-06-03 20:47:18,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:18,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:18,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:18,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:18,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:18,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:18,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 129 transitions, 1448 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:18,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:18,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:18,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:18,995 INFO L124 PetriNetUnfolderBase]: 1485/2514 cut-off events. [2024-06-03 20:47:18,995 INFO L125 PetriNetUnfolderBase]: For 56883/56883 co-relation queries the response was YES. [2024-06-03 20:47:19,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13989 conditions, 2514 events. 1485/2514 cut-off events. For 56883/56883 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14506 event pairs, 382 based on Foata normal form. 12/2522 useless extension candidates. Maximal degree in co-relation 13922. Up to 1795 conditions per place. [2024-06-03 20:47:19,012 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 117 selfloop transitions, 40 changer transitions 0/163 dead transitions. [2024-06-03 20:47:19,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 163 transitions, 1875 flow [2024-06-03 20:47:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:47:19,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-03 20:47:19,014 INFO L175 Difference]: Start difference. First operand has 134 places, 129 transitions, 1448 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:47:19,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 163 transitions, 1875 flow [2024-06-03 20:47:19,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 1794 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:19,086 INFO L231 Difference]: Finished difference. Result has 136 places, 130 transitions, 1477 flow [2024-06-03 20:47:19,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1477, PETRI_PLACES=136, PETRI_TRANSITIONS=130} [2024-06-03 20:47:19,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-03 20:47:19,087 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 130 transitions, 1477 flow [2024-06-03 20:47:19,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:19,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:19,087 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 20:47:19,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:47:19,088 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:19,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:19,088 INFO L85 PathProgramCache]: Analyzing trace with hash -484604352, now seen corresponding path program 1 times [2024-06-03 20:47:19,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:19,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39781832] [2024-06-03 20:47:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:19,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:19,392 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 20:47:19,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:19,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39781832] [2024-06-03 20:47:19,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39781832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:19,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:19,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:19,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102264333] [2024-06-03 20:47:19,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:19,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:19,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:19,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:19,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:19,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:19,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 130 transitions, 1477 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:19,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:19,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:19,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:19,708 INFO L124 PetriNetUnfolderBase]: 1490/2521 cut-off events. [2024-06-03 20:47:19,708 INFO L125 PetriNetUnfolderBase]: For 56108/56108 co-relation queries the response was YES. [2024-06-03 20:47:19,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14166 conditions, 2521 events. 1490/2521 cut-off events. For 56108/56108 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14517 event pairs, 394 based on Foata normal form. 1/2521 useless extension candidates. Maximal degree in co-relation 14098. Up to 2317 conditions per place. [2024-06-03 20:47:19,725 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 127 selfloop transitions, 19 changer transitions 0/152 dead transitions. [2024-06-03 20:47:19,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 152 transitions, 1931 flow [2024-06-03 20:47:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-03 20:47:19,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:47:19,727 INFO L175 Difference]: Start difference. First operand has 136 places, 130 transitions, 1477 flow. Second operand 5 states and 120 transitions. [2024-06-03 20:47:19,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 152 transitions, 1931 flow [2024-06-03 20:47:19,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 152 transitions, 1840 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:19,788 INFO L231 Difference]: Finished difference. Result has 136 places, 136 transitions, 1504 flow [2024-06-03 20:47:19,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1504, PETRI_PLACES=136, PETRI_TRANSITIONS=136} [2024-06-03 20:47:19,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-03 20:47:19,789 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 136 transitions, 1504 flow [2024-06-03 20:47:19,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:19,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:19,789 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 20:47:19,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:47:19,790 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 20:47:19,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:19,790 INFO L85 PathProgramCache]: Analyzing trace with hash 424967784, now seen corresponding path program 6 times [2024-06-03 20:47:19,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:19,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698755896] [2024-06-03 20:47:19,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:19,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:20,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:20,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698755896] [2024-06-03 20:47:20,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698755896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:20,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:20,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:20,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132710990] [2024-06-03 20:47:20,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:20,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:20,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:20,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:20,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:20,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:20,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 136 transitions, 1504 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:20,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:20,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:20,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:20,399 INFO L124 PetriNetUnfolderBase]: 1462/2480 cut-off events. [2024-06-03 20:47:20,399 INFO L125 PetriNetUnfolderBase]: For 59065/59068 co-relation queries the response was YES. [2024-06-03 20:47:20,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13557 conditions, 2480 events. 1462/2480 cut-off events. For 59065/59068 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14304 event pairs, 410 based on Foata normal form. 18/2490 useless extension candidates. Maximal degree in co-relation 13488. Up to 2057 conditions per place. [2024-06-03 20:47:20,418 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 124 selfloop transitions, 34 changer transitions 0/164 dead transitions. [2024-06-03 20:47:20,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 164 transitions, 1918 flow [2024-06-03 20:47:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:47:20,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:47:20,420 INFO L175 Difference]: Start difference. First operand has 136 places, 136 transitions, 1504 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:47:20,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 164 transitions, 1918 flow [2024-06-03 20:47:20,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 164 transitions, 1862 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-03 20:47:20,507 INFO L231 Difference]: Finished difference. Result has 142 places, 137 transitions, 1549 flow [2024-06-03 20:47:20,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1549, PETRI_PLACES=142, PETRI_TRANSITIONS=137} [2024-06-03 20:47:20,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-03 20:47:20,509 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 137 transitions, 1549 flow [2024-06-03 20:47:20,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:20,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:20,510 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 20:47:20,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:47:20,510 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:20,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:20,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1843301764, now seen corresponding path program 2 times [2024-06-03 20:47:20,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:20,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078372793] [2024-06-03 20:47:20,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:20,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:20,741 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 20:47:20,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:20,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078372793] [2024-06-03 20:47:20,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078372793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:20,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:20,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:20,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707547343] [2024-06-03 20:47:20,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:20,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:20,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:20,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:20,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:20,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:20,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 137 transitions, 1549 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:20,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:20,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:20,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:21,150 INFO L124 PetriNetUnfolderBase]: 1442/2448 cut-off events. [2024-06-03 20:47:21,150 INFO L125 PetriNetUnfolderBase]: For 55830/55833 co-relation queries the response was YES. [2024-06-03 20:47:21,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13228 conditions, 2448 events. 1442/2448 cut-off events. For 55830/55833 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14051 event pairs, 381 based on Foata normal form. 14/2454 useless extension candidates. Maximal degree in co-relation 13157. Up to 1938 conditions per place. [2024-06-03 20:47:21,172 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 125 selfloop transitions, 36 changer transitions 0/167 dead transitions. [2024-06-03 20:47:21,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 167 transitions, 1955 flow [2024-06-03 20:47:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:47:21,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 20:47:21,173 INFO L175 Difference]: Start difference. First operand has 142 places, 137 transitions, 1549 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:47:21,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 167 transitions, 1955 flow [2024-06-03 20:47:21,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 167 transitions, 1882 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:21,253 INFO L231 Difference]: Finished difference. Result has 144 places, 137 transitions, 1554 flow [2024-06-03 20:47:21,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1554, PETRI_PLACES=144, PETRI_TRANSITIONS=137} [2024-06-03 20:47:21,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-03 20:47:21,254 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 137 transitions, 1554 flow [2024-06-03 20:47:21,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:21,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:21,254 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 20:47:21,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:47:21,254 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:21,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:21,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1742196820, now seen corresponding path program 3 times [2024-06-03 20:47:21,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:21,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328635862] [2024-06-03 20:47:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:21,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:21,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:21,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328635862] [2024-06-03 20:47:21,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328635862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:21,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:21,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:21,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838806416] [2024-06-03 20:47:21,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:21,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:21,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:21,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:21,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:21,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:21,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 137 transitions, 1554 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:21,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:21,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:21,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:21,877 INFO L124 PetriNetUnfolderBase]: 1422/2416 cut-off events. [2024-06-03 20:47:21,877 INFO L125 PetriNetUnfolderBase]: For 53621/53624 co-relation queries the response was YES. [2024-06-03 20:47:21,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12848 conditions, 2416 events. 1422/2416 cut-off events. For 53621/53624 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13834 event pairs, 326 based on Foata normal form. 14/2422 useless extension candidates. Maximal degree in co-relation 12776. Up to 1405 conditions per place. [2024-06-03 20:47:21,894 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 117 selfloop transitions, 44 changer transitions 0/167 dead transitions. [2024-06-03 20:47:21,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 167 transitions, 1902 flow [2024-06-03 20:47:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:47:21,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-03 20:47:21,896 INFO L175 Difference]: Start difference. First operand has 144 places, 137 transitions, 1554 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:47:21,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 167 transitions, 1902 flow [2024-06-03 20:47:21,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 167 transitions, 1741 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:21,960 INFO L231 Difference]: Finished difference. Result has 142 places, 136 transitions, 1425 flow [2024-06-03 20:47:21,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1425, PETRI_PLACES=142, PETRI_TRANSITIONS=136} [2024-06-03 20:47:21,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-03 20:47:21,961 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 136 transitions, 1425 flow [2024-06-03 20:47:21,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 20:47:21,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:21,961 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 20:47:21,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:47:21,961 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 20:47:21,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:21,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1464429888, now seen corresponding path program 2 times [2024-06-03 20:47:21,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:21,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515891476] [2024-06-03 20:47:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:21,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:22,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:22,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515891476] [2024-06-03 20:47:22,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515891476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:22,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:22,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:22,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654192617] [2024-06-03 20:47:22,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:22,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:22,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:22,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:22,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 136 transitions, 1425 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 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 20:47:22,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:22,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:22,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:22,586 INFO L124 PetriNetUnfolderBase]: 1419/2409 cut-off events. [2024-06-03 20:47:22,586 INFO L125 PetriNetUnfolderBase]: For 49275/49275 co-relation queries the response was YES. [2024-06-03 20:47:22,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12565 conditions, 2409 events. 1419/2409 cut-off events. For 49275/49275 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13777 event pairs, 350 based on Foata normal form. 1/2409 useless extension candidates. Maximal degree in co-relation 12494. Up to 2209 conditions per place. [2024-06-03 20:47:22,602 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 128 selfloop transitions, 16 changer transitions 0/150 dead transitions. [2024-06-03 20:47:22,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 150 transitions, 1749 flow [2024-06-03 20:47:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:47:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:47:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-03 20:47:22,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-03 20:47:22,603 INFO L175 Difference]: Start difference. First operand has 142 places, 136 transitions, 1425 flow. Second operand 4 states and 101 transitions. [2024-06-03 20:47:22,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 150 transitions, 1749 flow [2024-06-03 20:47:22,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 150 transitions, 1602 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:22,673 INFO L231 Difference]: Finished difference. Result has 140 places, 136 transitions, 1323 flow [2024-06-03 20:47:22,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1323, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2024-06-03 20:47:22,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-03 20:47:22,674 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 1323 flow [2024-06-03 20:47:22,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 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 20:47:22,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:22,674 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 20:47:22,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:47:22,674 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 20:47:22,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:22,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2123651450, now seen corresponding path program 1 times [2024-06-03 20:47:22,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:22,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707108913] [2024-06-03 20:47:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:22,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:22,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:22,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707108913] [2024-06-03 20:47:22,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707108913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:22,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:22,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:22,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833021415] [2024-06-03 20:47:22,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:22,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:22,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:22,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:22,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:22,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:22,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 1323 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:22,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:22,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:22,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:23,267 INFO L124 PetriNetUnfolderBase]: 1362/2360 cut-off events. [2024-06-03 20:47:23,267 INFO L125 PetriNetUnfolderBase]: For 51980/51980 co-relation queries the response was YES. [2024-06-03 20:47:23,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11934 conditions, 2360 events. 1362/2360 cut-off events. For 51980/51980 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13771 event pairs, 322 based on Foata normal form. 2/2361 useless extension candidates. Maximal degree in co-relation 11863. Up to 2067 conditions per place. [2024-06-03 20:47:23,283 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 120 selfloop transitions, 26 changer transitions 0/162 dead transitions. [2024-06-03 20:47:23,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 162 transitions, 1779 flow [2024-06-03 20:47:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-03 20:47:23,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-03 20:47:23,285 INFO L175 Difference]: Start difference. First operand has 140 places, 136 transitions, 1323 flow. Second operand 9 states and 191 transitions. [2024-06-03 20:47:23,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 162 transitions, 1779 flow [2024-06-03 20:47:23,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 162 transitions, 1747 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:23,350 INFO L231 Difference]: Finished difference. Result has 146 places, 142 transitions, 1407 flow [2024-06-03 20:47:23,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1407, PETRI_PLACES=146, PETRI_TRANSITIONS=142} [2024-06-03 20:47:23,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-03 20:47:23,351 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 142 transitions, 1407 flow [2024-06-03 20:47:23,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:23,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:23,351 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 20:47:23,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:47:23,352 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 20:47:23,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1631556654, now seen corresponding path program 2 times [2024-06-03 20:47:23,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:23,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812471633] [2024-06-03 20:47:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:23,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:23,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:23,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812471633] [2024-06-03 20:47:23,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812471633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:23,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:23,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:23,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133712706] [2024-06-03 20:47:23,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:23,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:23,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:23,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:23,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 142 transitions, 1407 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:23,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:23,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:23,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:23,992 INFO L124 PetriNetUnfolderBase]: 1356/2350 cut-off events. [2024-06-03 20:47:23,992 INFO L125 PetriNetUnfolderBase]: For 54355/54355 co-relation queries the response was YES. [2024-06-03 20:47:24,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12165 conditions, 2350 events. 1356/2350 cut-off events. For 54355/54355 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13714 event pairs, 323 based on Foata normal form. 2/2348 useless extension candidates. Maximal degree in co-relation 12093. Up to 2065 conditions per place. [2024-06-03 20:47:24,009 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 120 selfloop transitions, 21 changer transitions 0/157 dead transitions. [2024-06-03 20:47:24,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 1727 flow [2024-06-03 20:47:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:24,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-03 20:47:24,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-03 20:47:24,010 INFO L175 Difference]: Start difference. First operand has 146 places, 142 transitions, 1407 flow. Second operand 5 states and 121 transitions. [2024-06-03 20:47:24,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 1727 flow [2024-06-03 20:47:24,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 157 transitions, 1639 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:24,082 INFO L231 Difference]: Finished difference. Result has 144 places, 142 transitions, 1372 flow [2024-06-03 20:47:24,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1372, PETRI_PLACES=144, PETRI_TRANSITIONS=142} [2024-06-03 20:47:24,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-03 20:47:24,082 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 142 transitions, 1372 flow [2024-06-03 20:47:24,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:24,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:24,083 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 20:47:24,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:47:24,083 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 20:47:24,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:24,083 INFO L85 PathProgramCache]: Analyzing trace with hash -133432892, now seen corresponding path program 1 times [2024-06-03 20:47:24,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:24,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500581974] [2024-06-03 20:47:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:24,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:24,357 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 20:47:24,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:24,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500581974] [2024-06-03 20:47:24,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500581974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:24,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:24,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468603018] [2024-06-03 20:47:24,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:24,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:24,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:24,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:24,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 142 transitions, 1372 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 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 20:47:24,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:24,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:24,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:24,646 INFO L124 PetriNetUnfolderBase]: 1418/2412 cut-off events. [2024-06-03 20:47:24,646 INFO L125 PetriNetUnfolderBase]: For 55717/55717 co-relation queries the response was YES. [2024-06-03 20:47:24,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12412 conditions, 2412 events. 1418/2412 cut-off events. For 55717/55717 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13820 event pairs, 347 based on Foata normal form. 2/2413 useless extension candidates. Maximal degree in co-relation 12341. Up to 2225 conditions per place. [2024-06-03 20:47:24,664 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 137 selfloop transitions, 10 changer transitions 0/153 dead transitions. [2024-06-03 20:47:24,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 153 transitions, 1712 flow [2024-06-03 20:47:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:47:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:47:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-03 20:47:24,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-03 20:47:24,666 INFO L175 Difference]: Start difference. First operand has 144 places, 142 transitions, 1372 flow. Second operand 4 states and 93 transitions. [2024-06-03 20:47:24,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 153 transitions, 1712 flow [2024-06-03 20:47:24,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 153 transitions, 1670 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:24,730 INFO L231 Difference]: Finished difference. Result has 144 places, 144 transitions, 1383 flow [2024-06-03 20:47:24,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1383, PETRI_PLACES=144, PETRI_TRANSITIONS=144} [2024-06-03 20:47:24,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-03 20:47:24,731 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 144 transitions, 1383 flow [2024-06-03 20:47:24,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 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 20:47:24,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:24,731 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 20:47:24,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:47:24,731 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 20:47:24,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2122527214, now seen corresponding path program 1 times [2024-06-03 20:47:24,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:24,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715398415] [2024-06-03 20:47:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:24,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:25,016 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 20:47:25,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:25,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715398415] [2024-06-03 20:47:25,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715398415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:25,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:25,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:25,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550776003] [2024-06-03 20:47:25,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:25,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:25,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:25,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:25,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:25,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:25,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 144 transitions, 1383 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:25,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:25,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:25,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:25,371 INFO L124 PetriNetUnfolderBase]: 1436/2444 cut-off events. [2024-06-03 20:47:25,371 INFO L125 PetriNetUnfolderBase]: For 59157/59160 co-relation queries the response was YES. [2024-06-03 20:47:25,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12705 conditions, 2444 events. 1436/2444 cut-off events. For 59157/59160 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14046 event pairs, 350 based on Foata normal form. 4/2446 useless extension candidates. Maximal degree in co-relation 12633. Up to 2090 conditions per place. [2024-06-03 20:47:25,389 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 47 changer transitions 0/180 dead transitions. [2024-06-03 20:47:25,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 180 transitions, 2057 flow [2024-06-03 20:47:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 20:47:25,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:47:25,390 INFO L175 Difference]: Start difference. First operand has 144 places, 144 transitions, 1383 flow. Second operand 6 states and 150 transitions. [2024-06-03 20:47:25,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 180 transitions, 2057 flow [2024-06-03 20:47:25,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 180 transitions, 2020 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:25,469 INFO L231 Difference]: Finished difference. Result has 149 places, 156 transitions, 1613 flow [2024-06-03 20:47:25,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1613, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2024-06-03 20:47:25,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-03 20:47:25,469 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1613 flow [2024-06-03 20:47:25,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:25,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:25,470 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 20:47:25,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:47:25,470 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:25,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:25,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2137832308, now seen corresponding path program 2 times [2024-06-03 20:47:25,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:25,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978570996] [2024-06-03 20:47:25,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:25,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:25,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:25,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978570996] [2024-06-03 20:47:25,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978570996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:25,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:25,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:25,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621700363] [2024-06-03 20:47:25,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:25,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:25,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:25,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:25,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:25,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:25,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1613 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:25,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:25,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:25,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:26,143 INFO L124 PetriNetUnfolderBase]: 1464/2488 cut-off events. [2024-06-03 20:47:26,143 INFO L125 PetriNetUnfolderBase]: For 64912/64915 co-relation queries the response was YES. [2024-06-03 20:47:26,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13616 conditions, 2488 events. 1464/2488 cut-off events. For 64912/64915 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14334 event pairs, 352 based on Foata normal form. 4/2490 useless extension candidates. Maximal degree in co-relation 13542. Up to 2118 conditions per place. [2024-06-03 20:47:26,161 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 130 selfloop transitions, 46 changer transitions 0/182 dead transitions. [2024-06-03 20:47:26,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 182 transitions, 2260 flow [2024-06-03 20:47:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 20:47:26,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-03 20:47:26,162 INFO L175 Difference]: Start difference. First operand has 149 places, 156 transitions, 1613 flow. Second operand 6 states and 143 transitions. [2024-06-03 20:47:26,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 182 transitions, 2260 flow [2024-06-03 20:47:26,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 182 transitions, 2198 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-03 20:47:26,242 INFO L231 Difference]: Finished difference. Result has 155 places, 164 transitions, 1776 flow [2024-06-03 20:47:26,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1776, PETRI_PLACES=155, PETRI_TRANSITIONS=164} [2024-06-03 20:47:26,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-03 20:47:26,242 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 164 transitions, 1776 flow [2024-06-03 20:47:26,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:26,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:26,243 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 20:47:26,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:47:26,243 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:26,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:26,243 INFO L85 PathProgramCache]: Analyzing trace with hash 422631160, now seen corresponding path program 3 times [2024-06-03 20:47:26,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:26,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612212172] [2024-06-03 20:47:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:26,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:26,533 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 20:47:26,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:26,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612212172] [2024-06-03 20:47:26,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612212172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:26,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:26,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:26,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441812126] [2024-06-03 20:47:26,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:26,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:26,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:26,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:26,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:26,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:26,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 164 transitions, 1776 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:26,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:26,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:26,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:26,886 INFO L124 PetriNetUnfolderBase]: 1460/2484 cut-off events. [2024-06-03 20:47:26,886 INFO L125 PetriNetUnfolderBase]: For 66992/66995 co-relation queries the response was YES. [2024-06-03 20:47:26,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13706 conditions, 2484 events. 1460/2484 cut-off events. For 66992/66995 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14337 event pairs, 352 based on Foata normal form. 4/2486 useless extension candidates. Maximal degree in co-relation 13629. Up to 2148 conditions per place. [2024-06-03 20:47:26,905 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 136 selfloop transitions, 44 changer transitions 0/186 dead transitions. [2024-06-03 20:47:26,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 186 transitions, 2266 flow [2024-06-03 20:47:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-03 20:47:26,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-03 20:47:26,906 INFO L175 Difference]: Start difference. First operand has 155 places, 164 transitions, 1776 flow. Second operand 5 states and 131 transitions. [2024-06-03 20:47:26,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 186 transitions, 2266 flow [2024-06-03 20:47:27,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 186 transitions, 2167 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:27,027 INFO L231 Difference]: Finished difference. Result has 158 places, 164 transitions, 1786 flow [2024-06-03 20:47:27,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1786, PETRI_PLACES=158, PETRI_TRANSITIONS=164} [2024-06-03 20:47:27,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-03 20:47:27,027 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 164 transitions, 1786 flow [2024-06-03 20:47:27,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:27,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:27,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:27,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:47:27,027 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:27,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1483583373, now seen corresponding path program 1 times [2024-06-03 20:47:27,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:27,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556541712] [2024-06-03 20:47:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:27,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:27,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:27,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556541712] [2024-06-03 20:47:27,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556541712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:27,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:27,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:27,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354469952] [2024-06-03 20:47:27,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:27,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:27,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:27,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:27,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:27,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:27,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 164 transitions, 1786 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:27,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:27,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:27,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:27,686 INFO L124 PetriNetUnfolderBase]: 1486/2523 cut-off events. [2024-06-03 20:47:27,686 INFO L125 PetriNetUnfolderBase]: For 72394/72394 co-relation queries the response was YES. [2024-06-03 20:47:27,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14053 conditions, 2523 events. 1486/2523 cut-off events. For 72394/72394 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14566 event pairs, 350 based on Foata normal form. 2/2521 useless extension candidates. Maximal degree in co-relation 13975. Up to 2085 conditions per place. [2024-06-03 20:47:27,705 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 139 selfloop transitions, 65 changer transitions 0/210 dead transitions. [2024-06-03 20:47:27,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 210 transitions, 2576 flow [2024-06-03 20:47:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-03 20:47:27,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-03 20:47:27,706 INFO L175 Difference]: Start difference. First operand has 158 places, 164 transitions, 1786 flow. Second operand 11 states and 239 transitions. [2024-06-03 20:47:27,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 210 transitions, 2576 flow [2024-06-03 20:47:27,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 210 transitions, 2467 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:27,796 INFO L231 Difference]: Finished difference. Result has 166 places, 180 transitions, 1989 flow [2024-06-03 20:47:27,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1989, PETRI_PLACES=166, PETRI_TRANSITIONS=180} [2024-06-03 20:47:27,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-03 20:47:27,797 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 180 transitions, 1989 flow [2024-06-03 20:47:27,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:27,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:27,797 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 20:47:27,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:47:27,797 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:27,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:27,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2025656063, now seen corresponding path program 1 times [2024-06-03 20:47:27,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:27,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143787627] [2024-06-03 20:47:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:27,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:28,078 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 20:47:28,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:28,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143787627] [2024-06-03 20:47:28,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143787627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:28,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:28,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:28,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794668413] [2024-06-03 20:47:28,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:28,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:28,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:28,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:28,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:28,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:28,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 180 transitions, 1989 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:28,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:28,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:28,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:28,453 INFO L124 PetriNetUnfolderBase]: 1512/2562 cut-off events. [2024-06-03 20:47:28,453 INFO L125 PetriNetUnfolderBase]: For 78938/78941 co-relation queries the response was YES. [2024-06-03 20:47:28,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14947 conditions, 2562 events. 1512/2562 cut-off events. For 78938/78941 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14779 event pairs, 348 based on Foata normal form. 4/2564 useless extension candidates. Maximal degree in co-relation 14867. Up to 2174 conditions per place. [2024-06-03 20:47:28,474 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 144 selfloop transitions, 61 changer transitions 0/211 dead transitions. [2024-06-03 20:47:28,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 2750 flow [2024-06-03 20:47:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:28,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 20:47:28,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 20:47:28,485 INFO L175 Difference]: Start difference. First operand has 166 places, 180 transitions, 1989 flow. Second operand 6 states and 147 transitions. [2024-06-03 20:47:28,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 2750 flow [2024-06-03 20:47:28,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 211 transitions, 2590 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:28,637 INFO L231 Difference]: Finished difference. Result has 166 places, 190 transitions, 2129 flow [2024-06-03 20:47:28,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2129, PETRI_PLACES=166, PETRI_TRANSITIONS=190} [2024-06-03 20:47:28,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-03 20:47:28,638 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 190 transitions, 2129 flow [2024-06-03 20:47:28,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:28,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:28,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:28,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:47:28,638 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:28,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:28,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2025656249, now seen corresponding path program 2 times [2024-06-03 20:47:28,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:28,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085832416] [2024-06-03 20:47:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:28,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:28,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:28,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085832416] [2024-06-03 20:47:28,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085832416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:28,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:28,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:28,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951082363] [2024-06-03 20:47:28,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:28,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:28,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:28,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:28,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:29,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:29,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 190 transitions, 2129 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:29,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:29,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:29,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:29,412 INFO L124 PetriNetUnfolderBase]: 1506/2554 cut-off events. [2024-06-03 20:47:29,412 INFO L125 PetriNetUnfolderBase]: For 80597/80600 co-relation queries the response was YES. [2024-06-03 20:47:29,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14933 conditions, 2554 events. 1506/2554 cut-off events. For 80597/80600 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14728 event pairs, 346 based on Foata normal form. 4/2556 useless extension candidates. Maximal degree in co-relation 14852. Up to 2216 conditions per place. [2024-06-03 20:47:29,428 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 37 changer transitions 0/212 dead transitions. [2024-06-03 20:47:29,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 212 transitions, 2597 flow [2024-06-03 20:47:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 20:47:29,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-03 20:47:29,430 INFO L175 Difference]: Start difference. First operand has 166 places, 190 transitions, 2129 flow. Second operand 6 states and 146 transitions. [2024-06-03 20:47:29,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 212 transitions, 2597 flow [2024-06-03 20:47:29,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 212 transitions, 2497 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:29,536 INFO L231 Difference]: Finished difference. Result has 170 places, 190 transitions, 2115 flow [2024-06-03 20:47:29,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2115, PETRI_PLACES=170, PETRI_TRANSITIONS=190} [2024-06-03 20:47:29,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-03 20:47:29,537 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 190 transitions, 2115 flow [2024-06-03 20:47:29,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:29,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:29,537 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 20:47:29,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:47:29,537 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:29,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:29,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1661072199, now seen corresponding path program 2 times [2024-06-03 20:47:29,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:29,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340647107] [2024-06-03 20:47:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:29,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:29,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:29,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340647107] [2024-06-03 20:47:29,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340647107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:29,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:29,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:29,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126394795] [2024-06-03 20:47:29,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:29,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:29,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:29,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:29,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:29,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:29,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 190 transitions, 2115 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:29,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:29,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:29,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:30,223 INFO L124 PetriNetUnfolderBase]: 1500/2546 cut-off events. [2024-06-03 20:47:30,224 INFO L125 PetriNetUnfolderBase]: For 82844/82847 co-relation queries the response was YES. [2024-06-03 20:47:30,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14845 conditions, 2546 events. 1500/2546 cut-off events. For 82844/82847 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14700 event pairs, 348 based on Foata normal form. 4/2548 useless extension candidates. Maximal degree in co-relation 14763. Up to 2161 conditions per place. [2024-06-03 20:47:30,243 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 148 selfloop transitions, 54 changer transitions 0/208 dead transitions. [2024-06-03 20:47:30,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 208 transitions, 2727 flow [2024-06-03 20:47:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 20:47:30,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-03 20:47:30,244 INFO L175 Difference]: Start difference. First operand has 170 places, 190 transitions, 2115 flow. Second operand 6 states and 143 transitions. [2024-06-03 20:47:30,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 208 transitions, 2727 flow [2024-06-03 20:47:30,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 208 transitions, 2653 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:30,386 INFO L231 Difference]: Finished difference. Result has 171 places, 190 transitions, 2158 flow [2024-06-03 20:47:30,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2158, PETRI_PLACES=171, PETRI_TRANSITIONS=190} [2024-06-03 20:47:30,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-03 20:47:30,387 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 190 transitions, 2158 flow [2024-06-03 20:47:30,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:30,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:30,387 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 20:47:30,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:47:30,387 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:30,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:30,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1848278465, now seen corresponding path program 1 times [2024-06-03 20:47:30,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:30,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21074593] [2024-06-03 20:47:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:30,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:30,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:30,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21074593] [2024-06-03 20:47:30,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21074593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:30,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:30,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:30,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412265790] [2024-06-03 20:47:30,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:30,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:30,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:30,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:30,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:30,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:30,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 190 transitions, 2158 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:30,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:30,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:30,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:31,069 INFO L124 PetriNetUnfolderBase]: 1508/2557 cut-off events. [2024-06-03 20:47:31,069 INFO L125 PetriNetUnfolderBase]: For 86723/86723 co-relation queries the response was YES. [2024-06-03 20:47:31,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15081 conditions, 2557 events. 1508/2557 cut-off events. For 86723/86723 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14729 event pairs, 342 based on Foata normal form. 2/2558 useless extension candidates. Maximal degree in co-relation 14998. Up to 2326 conditions per place. [2024-06-03 20:47:31,089 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 182 selfloop transitions, 21 changer transitions 0/209 dead transitions. [2024-06-03 20:47:31,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 209 transitions, 2646 flow [2024-06-03 20:47:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:31,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 20:47:31,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:47:31,090 INFO L175 Difference]: Start difference. First operand has 171 places, 190 transitions, 2158 flow. Second operand 6 states and 135 transitions. [2024-06-03 20:47:31,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 209 transitions, 2646 flow [2024-06-03 20:47:31,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 209 transitions, 2545 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:31,257 INFO L231 Difference]: Finished difference. Result has 174 places, 192 transitions, 2148 flow [2024-06-03 20:47:31,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2148, PETRI_PLACES=174, PETRI_TRANSITIONS=192} [2024-06-03 20:47:31,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-03 20:47:31,258 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 192 transitions, 2148 flow [2024-06-03 20:47:31,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:31,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:31,258 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 20:47:31,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:47:31,258 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:31,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:31,259 INFO L85 PathProgramCache]: Analyzing trace with hash 708170969, now seen corresponding path program 3 times [2024-06-03 20:47:31,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:31,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629654520] [2024-06-03 20:47:31,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:31,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:31,544 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 20:47:31,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:31,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629654520] [2024-06-03 20:47:31,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629654520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:31,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:31,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:31,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064352854] [2024-06-03 20:47:31,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:31,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:31,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:31,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:31,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:31,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:31,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 192 transitions, 2148 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:31,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:31,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:31,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:31,995 INFO L124 PetriNetUnfolderBase]: 1521/2565 cut-off events. [2024-06-03 20:47:31,996 INFO L125 PetriNetUnfolderBase]: For 91579/91579 co-relation queries the response was YES. [2024-06-03 20:47:32,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15272 conditions, 2565 events. 1521/2565 cut-off events. For 91579/91579 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 14740 event pairs, 370 based on Foata normal form. 1/2559 useless extension candidates. Maximal degree in co-relation 15188. Up to 2130 conditions per place. [2024-06-03 20:47:32,018 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 80 changer transitions 0/228 dead transitions. [2024-06-03 20:47:32,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 228 transitions, 3040 flow [2024-06-03 20:47:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-03 20:47:32,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277161862527716 [2024-06-03 20:47:32,020 INFO L175 Difference]: Start difference. First operand has 174 places, 192 transitions, 2148 flow. Second operand 11 states and 238 transitions. [2024-06-03 20:47:32,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 228 transitions, 3040 flow [2024-06-03 20:47:32,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 228 transitions, 2965 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:32,190 INFO L231 Difference]: Finished difference. Result has 181 places, 201 transitions, 2367 flow [2024-06-03 20:47:32,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2367, PETRI_PLACES=181, PETRI_TRANSITIONS=201} [2024-06-03 20:47:32,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-03 20:47:32,191 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 201 transitions, 2367 flow [2024-06-03 20:47:32,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:32,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:32,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:32,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:47:32,191 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:32,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:32,192 INFO L85 PathProgramCache]: Analyzing trace with hash 480269819, now seen corresponding path program 4 times [2024-06-03 20:47:32,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:32,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833059261] [2024-06-03 20:47:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:32,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:32,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:32,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833059261] [2024-06-03 20:47:32,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833059261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:32,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:32,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:32,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294331897] [2024-06-03 20:47:32,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:32,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:32,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:32,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:32,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:32,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 201 transitions, 2367 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:32,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:32,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:32,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:32,881 INFO L124 PetriNetUnfolderBase]: 1526/2574 cut-off events. [2024-06-03 20:47:32,881 INFO L125 PetriNetUnfolderBase]: For 95991/95991 co-relation queries the response was YES. [2024-06-03 20:47:32,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15619 conditions, 2574 events. 1526/2574 cut-off events. For 95991/95991 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 14786 event pairs, 370 based on Foata normal form. 1/2568 useless extension candidates. Maximal degree in co-relation 15534. Up to 2134 conditions per place. [2024-06-03 20:47:32,903 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 144 selfloop transitions, 81 changer transitions 0/231 dead transitions. [2024-06-03 20:47:32,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 231 transitions, 3193 flow [2024-06-03 20:47:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-03 20:47:32,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277161862527716 [2024-06-03 20:47:32,905 INFO L175 Difference]: Start difference. First operand has 181 places, 201 transitions, 2367 flow. Second operand 11 states and 238 transitions. [2024-06-03 20:47:32,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 231 transitions, 3193 flow [2024-06-03 20:47:33,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 231 transitions, 3056 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:33,070 INFO L231 Difference]: Finished difference. Result has 187 places, 204 transitions, 2446 flow [2024-06-03 20:47:33,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2446, PETRI_PLACES=187, PETRI_TRANSITIONS=204} [2024-06-03 20:47:33,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-03 20:47:33,070 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 204 transitions, 2446 flow [2024-06-03 20:47:33,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:33,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:33,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:33,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:47:33,071 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:33,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash 480389975, now seen corresponding path program 3 times [2024-06-03 20:47:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:33,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013973950] [2024-06-03 20:47:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:33,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:33,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013973950] [2024-06-03 20:47:33,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013973950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:33,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:33,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:33,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579972446] [2024-06-03 20:47:33,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:33,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:33,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:33,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:33,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:33,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:33,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 204 transitions, 2446 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:33,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:33,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:33,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:33,726 INFO L124 PetriNetUnfolderBase]: 1521/2570 cut-off events. [2024-06-03 20:47:33,726 INFO L125 PetriNetUnfolderBase]: For 97824/97824 co-relation queries the response was YES. [2024-06-03 20:47:33,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15666 conditions, 2570 events. 1521/2570 cut-off events. For 97824/97824 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 14776 event pairs, 371 based on Foata normal form. 1/2566 useless extension candidates. Maximal degree in co-relation 15580. Up to 2193 conditions per place. [2024-06-03 20:47:33,747 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 151 selfloop transitions, 65 changer transitions 0/222 dead transitions. [2024-06-03 20:47:33,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 222 transitions, 3102 flow [2024-06-03 20:47:33,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 20:47:33,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:47:33,748 INFO L175 Difference]: Start difference. First operand has 187 places, 204 transitions, 2446 flow. Second operand 6 states and 144 transitions. [2024-06-03 20:47:33,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 222 transitions, 3102 flow [2024-06-03 20:47:33,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 222 transitions, 2938 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:33,939 INFO L231 Difference]: Finished difference. Result has 186 places, 204 transitions, 2418 flow [2024-06-03 20:47:33,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2418, PETRI_PLACES=186, PETRI_TRANSITIONS=204} [2024-06-03 20:47:33,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-03 20:47:33,940 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 204 transitions, 2418 flow [2024-06-03 20:47:33,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:33,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:33,940 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 20:47:33,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:47:33,940 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:33,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:33,941 INFO L85 PathProgramCache]: Analyzing trace with hash 147611243, now seen corresponding path program 5 times [2024-06-03 20:47:33,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:33,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510596069] [2024-06-03 20:47:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:33,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:34,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:34,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510596069] [2024-06-03 20:47:34,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510596069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:34,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:34,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:34,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404708667] [2024-06-03 20:47:34,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:34,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:34,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:34,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:34,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:34,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:34,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 204 transitions, 2418 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:34,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:34,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:34,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:34,641 INFO L124 PetriNetUnfolderBase]: 1526/2573 cut-off events. [2024-06-03 20:47:34,641 INFO L125 PetriNetUnfolderBase]: For 101521/101521 co-relation queries the response was YES. [2024-06-03 20:47:34,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15712 conditions, 2573 events. 1526/2573 cut-off events. For 101521/101521 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14804 event pairs, 370 based on Foata normal form. 1/2567 useless extension candidates. Maximal degree in co-relation 15626. Up to 2131 conditions per place. [2024-06-03 20:47:34,664 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 139 selfloop transitions, 85 changer transitions 0/230 dead transitions. [2024-06-03 20:47:34,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 230 transitions, 3149 flow [2024-06-03 20:47:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-03 20:47:34,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-03 20:47:34,667 INFO L175 Difference]: Start difference. First operand has 186 places, 204 transitions, 2418 flow. Second operand 10 states and 219 transitions. [2024-06-03 20:47:34,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 230 transitions, 3149 flow [2024-06-03 20:47:34,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 230 transitions, 2871 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:34,900 INFO L231 Difference]: Finished difference. Result has 188 places, 208 transitions, 2363 flow [2024-06-03 20:47:34,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2140, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2363, PETRI_PLACES=188, PETRI_TRANSITIONS=208} [2024-06-03 20:47:34,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-03 20:47:34,901 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 208 transitions, 2363 flow [2024-06-03 20:47:34,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:34,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:34,901 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 20:47:34,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:47:34,901 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:34,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:34,902 INFO L85 PathProgramCache]: Analyzing trace with hash 480389789, now seen corresponding path program 6 times [2024-06-03 20:47:34,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:34,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190104611] [2024-06-03 20:47:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:34,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:35,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:35,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190104611] [2024-06-03 20:47:35,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190104611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:35,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:35,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:35,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828523059] [2024-06-03 20:47:35,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:35,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:35,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:35,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:35,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:35,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:35,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 208 transitions, 2363 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:35,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:35,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:35,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:35,625 INFO L124 PetriNetUnfolderBase]: 1523/2575 cut-off events. [2024-06-03 20:47:35,625 INFO L125 PetriNetUnfolderBase]: For 103248/103248 co-relation queries the response was YES. [2024-06-03 20:47:35,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15644 conditions, 2575 events. 1523/2575 cut-off events. For 103248/103248 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14821 event pairs, 362 based on Foata normal form. 1/2571 useless extension candidates. Maximal degree in co-relation 15558. Up to 2253 conditions per place. [2024-06-03 20:47:35,648 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 184 selfloop transitions, 37 changer transitions 0/227 dead transitions. [2024-06-03 20:47:35,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 227 transitions, 2853 flow [2024-06-03 20:47:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 20:47:35,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-03 20:47:35,649 INFO L175 Difference]: Start difference. First operand has 188 places, 208 transitions, 2363 flow. Second operand 6 states and 143 transitions. [2024-06-03 20:47:35,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 227 transitions, 2853 flow [2024-06-03 20:47:35,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 227 transitions, 2679 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:35,869 INFO L231 Difference]: Finished difference. Result has 188 places, 208 transitions, 2273 flow [2024-06-03 20:47:35,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2273, PETRI_PLACES=188, PETRI_TRANSITIONS=208} [2024-06-03 20:47:35,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-03 20:47:35,869 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 208 transitions, 2273 flow [2024-06-03 20:47:35,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:35,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:35,869 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 20:47:35,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:47:35,870 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:35,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:35,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1102949489, now seen corresponding path program 4 times [2024-06-03 20:47:35,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:35,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134977469] [2024-06-03 20:47:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:35,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:36,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:36,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134977469] [2024-06-03 20:47:36,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134977469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:36,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:36,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:36,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92984219] [2024-06-03 20:47:36,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:36,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:36,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:36,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:36,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:36,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:36,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 208 transitions, 2273 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:36,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:36,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:36,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:36,594 INFO L124 PetriNetUnfolderBase]: 1533/2593 cut-off events. [2024-06-03 20:47:36,594 INFO L125 PetriNetUnfolderBase]: For 106319/106319 co-relation queries the response was YES. [2024-06-03 20:47:36,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15671 conditions, 2593 events. 1533/2593 cut-off events. For 106319/106319 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 14990 event pairs, 342 based on Foata normal form. 1/2593 useless extension candidates. Maximal degree in co-relation 15584. Up to 2370 conditions per place. [2024-06-03 20:47:36,615 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 199 selfloop transitions, 22 changer transitions 0/227 dead transitions. [2024-06-03 20:47:36,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 227 transitions, 2819 flow [2024-06-03 20:47:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-03 20:47:36,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:47:36,616 INFO L175 Difference]: Start difference. First operand has 188 places, 208 transitions, 2273 flow. Second operand 6 states and 132 transitions. [2024-06-03 20:47:36,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 227 transitions, 2819 flow [2024-06-03 20:47:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 227 transitions, 2739 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:36,861 INFO L231 Difference]: Finished difference. Result has 188 places, 214 transitions, 2321 flow [2024-06-03 20:47:36,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2321, PETRI_PLACES=188, PETRI_TRANSITIONS=214} [2024-06-03 20:47:36,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-03 20:47:36,861 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 214 transitions, 2321 flow [2024-06-03 20:47:36,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:36,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:36,862 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 20:47:36,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:47:36,862 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:36,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:36,862 INFO L85 PathProgramCache]: Analyzing trace with hash 834889979, now seen corresponding path program 7 times [2024-06-03 20:47:36,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:36,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685189116] [2024-06-03 20:47:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:36,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:37,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:37,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685189116] [2024-06-03 20:47:37,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685189116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:37,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:37,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:37,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529233384] [2024-06-03 20:47:37,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:37,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:37,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:37,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:37,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:37,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:37,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 214 transitions, 2321 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:37,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:37,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:37,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:37,599 INFO L124 PetriNetUnfolderBase]: 1530/2585 cut-off events. [2024-06-03 20:47:37,599 INFO L125 PetriNetUnfolderBase]: For 105527/105527 co-relation queries the response was YES. [2024-06-03 20:47:37,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15521 conditions, 2585 events. 1530/2585 cut-off events. For 105527/105527 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 14903 event pairs, 362 based on Foata normal form. 1/2581 useless extension candidates. Maximal degree in co-relation 15434. Up to 2215 conditions per place. [2024-06-03 20:47:37,623 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 172 selfloop transitions, 55 changer transitions 0/233 dead transitions. [2024-06-03 20:47:37,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 233 transitions, 2823 flow [2024-06-03 20:47:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:47:37,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-03 20:47:37,624 INFO L175 Difference]: Start difference. First operand has 188 places, 214 transitions, 2321 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:47:37,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 233 transitions, 2823 flow [2024-06-03 20:47:37,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 233 transitions, 2746 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:37,870 INFO L231 Difference]: Finished difference. Result has 192 places, 214 transitions, 2364 flow [2024-06-03 20:47:37,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2244, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2364, PETRI_PLACES=192, PETRI_TRANSITIONS=214} [2024-06-03 20:47:37,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-03 20:47:37,871 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 214 transitions, 2364 flow [2024-06-03 20:47:37,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:37,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:37,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:37,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:47:37,871 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 20:47:37,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:37,871 INFO L85 PathProgramCache]: Analyzing trace with hash 377086169, now seen corresponding path program 5 times [2024-06-03 20:47:37,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:37,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172466114] [2024-06-03 20:47:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:37,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:38,137 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 20:47:38,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:38,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172466114] [2024-06-03 20:47:38,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172466114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:38,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:38,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:38,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998293202] [2024-06-03 20:47:38,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:38,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:38,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:38,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:38,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:38,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:38,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 214 transitions, 2364 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:38,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:38,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:38,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:38,546 INFO L124 PetriNetUnfolderBase]: 1524/2582 cut-off events. [2024-06-03 20:47:38,546 INFO L125 PetriNetUnfolderBase]: For 108301/108304 co-relation queries the response was YES. [2024-06-03 20:47:38,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15583 conditions, 2582 events. 1524/2582 cut-off events. For 108301/108304 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14936 event pairs, 349 based on Foata normal form. 4/2584 useless extension candidates. Maximal degree in co-relation 15495. Up to 2231 conditions per place. [2024-06-03 20:47:38,565 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 49 changer transitions 0/233 dead transitions. [2024-06-03 20:47:38,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 233 transitions, 2964 flow [2024-06-03 20:47:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-03 20:47:38,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-03 20:47:38,566 INFO L175 Difference]: Start difference. First operand has 192 places, 214 transitions, 2364 flow. Second operand 5 states and 128 transitions. [2024-06-03 20:47:38,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 233 transitions, 2964 flow [2024-06-03 20:47:38,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 233 transitions, 2860 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:38,792 INFO L231 Difference]: Finished difference. Result has 193 places, 214 transitions, 2379 flow [2024-06-03 20:47:38,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2379, PETRI_PLACES=193, PETRI_TRANSITIONS=214} [2024-06-03 20:47:38,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-03 20:47:38,792 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 214 transitions, 2379 flow [2024-06-03 20:47:38,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:38,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:38,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:38,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:47:38,793 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 20:47:38,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:38,793 INFO L85 PathProgramCache]: Analyzing trace with hash 389805779, now seen corresponding path program 6 times [2024-06-03 20:47:38,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:38,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672601476] [2024-06-03 20:47:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:38,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:39,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:39,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672601476] [2024-06-03 20:47:39,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672601476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:39,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:39,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:39,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609844633] [2024-06-03 20:47:39,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:39,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:39,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:39,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:39,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:39,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:39,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 214 transitions, 2379 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:39,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:39,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:39,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:39,489 INFO L124 PetriNetUnfolderBase]: 1519/2573 cut-off events. [2024-06-03 20:47:39,489 INFO L125 PetriNetUnfolderBase]: For 105758/105758 co-relation queries the response was YES. [2024-06-03 20:47:39,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15485 conditions, 2573 events. 1519/2573 cut-off events. For 105758/105758 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 14839 event pairs, 342 based on Foata normal form. 1/2573 useless extension candidates. Maximal degree in co-relation 15397. Up to 2226 conditions per place. [2024-06-03 20:47:39,512 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 56 changer transitions 0/240 dead transitions. [2024-06-03 20:47:39,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 240 transitions, 2913 flow [2024-06-03 20:47:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:47:39,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-03 20:47:39,513 INFO L175 Difference]: Start difference. First operand has 193 places, 214 transitions, 2379 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:47:39,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 240 transitions, 2913 flow [2024-06-03 20:47:39,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 240 transitions, 2738 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:39,766 INFO L231 Difference]: Finished difference. Result has 194 places, 214 transitions, 2333 flow [2024-06-03 20:47:39,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2333, PETRI_PLACES=194, PETRI_TRANSITIONS=214} [2024-06-03 20:47:39,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-03 20:47:39,766 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 214 transitions, 2333 flow [2024-06-03 20:47:39,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:39,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:39,767 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 20:47:39,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:47:39,767 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 20:47:39,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash 216677715, now seen corresponding path program 2 times [2024-06-03 20:47:39,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:39,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455525978] [2024-06-03 20:47:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:39,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:40,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:40,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455525978] [2024-06-03 20:47:40,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455525978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:40,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:40,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:40,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750868394] [2024-06-03 20:47:40,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:40,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:40,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:40,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:40,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:40,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:40,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 214 transitions, 2333 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:40,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:40,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:40,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:40,472 INFO L124 PetriNetUnfolderBase]: 1527/2585 cut-off events. [2024-06-03 20:47:40,472 INFO L125 PetriNetUnfolderBase]: For 107039/107039 co-relation queries the response was YES. [2024-06-03 20:47:40,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15547 conditions, 2585 events. 1527/2585 cut-off events. For 107039/107039 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14933 event pairs, 344 based on Foata normal form. 2/2586 useless extension candidates. Maximal degree in co-relation 15459. Up to 2357 conditions per place. [2024-06-03 20:47:40,493 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 208 selfloop transitions, 18 changer transitions 0/232 dead transitions. [2024-06-03 20:47:40,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 232 transitions, 2869 flow [2024-06-03 20:47:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 20:47:40,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-03 20:47:40,494 INFO L175 Difference]: Start difference. First operand has 194 places, 214 transitions, 2333 flow. Second operand 5 states and 118 transitions. [2024-06-03 20:47:40,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 232 transitions, 2869 flow [2024-06-03 20:47:40,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 232 transitions, 2746 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:40,743 INFO L231 Difference]: Finished difference. Result has 192 places, 216 transitions, 2299 flow [2024-06-03 20:47:40,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2299, PETRI_PLACES=192, PETRI_TRANSITIONS=216} [2024-06-03 20:47:40,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-03 20:47:40,743 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 216 transitions, 2299 flow [2024-06-03 20:47:40,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:40,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:40,744 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 20:47:40,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:47:40,744 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 20:47:40,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:40,744 INFO L85 PathProgramCache]: Analyzing trace with hash 620030627, now seen corresponding path program 3 times [2024-06-03 20:47:40,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:40,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704576332] [2024-06-03 20:47:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:40,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:41,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:41,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704576332] [2024-06-03 20:47:41,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704576332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:41,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:41,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:41,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542666706] [2024-06-03 20:47:41,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:41,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:41,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:41,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:41,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:41,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:41,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 216 transitions, 2299 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:41,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:41,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:41,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:41,450 INFO L124 PetriNetUnfolderBase]: 1522/2578 cut-off events. [2024-06-03 20:47:41,450 INFO L125 PetriNetUnfolderBase]: For 100999/100999 co-relation queries the response was YES. [2024-06-03 20:47:41,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15256 conditions, 2578 events. 1522/2578 cut-off events. For 100999/100999 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14912 event pairs, 341 based on Foata normal form. 2/2579 useless extension candidates. Maximal degree in co-relation 15168. Up to 2336 conditions per place. [2024-06-03 20:47:41,474 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 208 selfloop transitions, 22 changer transitions 0/236 dead transitions. [2024-06-03 20:47:41,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 236 transitions, 2851 flow [2024-06-03 20:47:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-03 20:47:41,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-03 20:47:41,475 INFO L175 Difference]: Start difference. First operand has 192 places, 216 transitions, 2299 flow. Second operand 6 states and 136 transitions. [2024-06-03 20:47:41,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 236 transitions, 2851 flow [2024-06-03 20:47:41,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 236 transitions, 2778 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:41,670 INFO L231 Difference]: Finished difference. Result has 195 places, 218 transitions, 2327 flow [2024-06-03 20:47:41,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2327, PETRI_PLACES=195, PETRI_TRANSITIONS=218} [2024-06-03 20:47:41,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-03 20:47:41,671 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 218 transitions, 2327 flow [2024-06-03 20:47:41,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:41,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:41,671 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 20:47:41,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:47:41,672 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 20:47:41,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash 716750777, now seen corresponding path program 1 times [2024-06-03 20:47:41,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:41,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754693362] [2024-06-03 20:47:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:41,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:41,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:41,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754693362] [2024-06-03 20:47:41,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754693362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:41,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:41,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:41,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449114907] [2024-06-03 20:47:41,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:41,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:41,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:41,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:41,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:42,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:42,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 218 transitions, 2327 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:42,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:42,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:42,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:42,436 INFO L124 PetriNetUnfolderBase]: 1519/2609 cut-off events. [2024-06-03 20:47:42,436 INFO L125 PetriNetUnfolderBase]: For 120510/120510 co-relation queries the response was YES. [2024-06-03 20:47:42,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15748 conditions, 2609 events. 1519/2609 cut-off events. For 120510/120510 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15403 event pairs, 314 based on Foata normal form. 8/2613 useless extension candidates. Maximal degree in co-relation 15659. Up to 2176 conditions per place. [2024-06-03 20:47:42,458 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 188 selfloop transitions, 37 changer transitions 0/251 dead transitions. [2024-06-03 20:47:42,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 251 transitions, 3003 flow [2024-06-03 20:47:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-03 20:47:42,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-03 20:47:42,460 INFO L175 Difference]: Start difference. First operand has 195 places, 218 transitions, 2327 flow. Second operand 10 states and 216 transitions. [2024-06-03 20:47:42,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 251 transitions, 3003 flow [2024-06-03 20:47:42,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 251 transitions, 2918 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:42,638 INFO L231 Difference]: Finished difference. Result has 201 places, 220 transitions, 2350 flow [2024-06-03 20:47:42,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2350, PETRI_PLACES=201, PETRI_TRANSITIONS=220} [2024-06-03 20:47:42,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-03 20:47:42,638 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 220 transitions, 2350 flow [2024-06-03 20:47:42,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:42,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:42,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:42,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:47:42,639 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 20:47:42,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:42,639 INFO L85 PathProgramCache]: Analyzing trace with hash 147620171, now seen corresponding path program 2 times [2024-06-03 20:47:42,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:42,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593828853] [2024-06-03 20:47:42,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:42,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:42,927 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 20:47:42,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:42,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593828853] [2024-06-03 20:47:42,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593828853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:42,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:42,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:42,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539401156] [2024-06-03 20:47:42,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:42,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:42,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:42,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:42,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:42,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:42,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 220 transitions, 2350 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:42,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:42,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:42,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:43,381 INFO L124 PetriNetUnfolderBase]: 1560/2674 cut-off events. [2024-06-03 20:47:43,381 INFO L125 PetriNetUnfolderBase]: For 127771/127771 co-relation queries the response was YES. [2024-06-03 20:47:43,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16193 conditions, 2674 events. 1560/2674 cut-off events. For 127771/127771 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 15844 event pairs, 342 based on Foata normal form. 10/2683 useless extension candidates. Maximal degree in co-relation 16103. Up to 2302 conditions per place. [2024-06-03 20:47:43,405 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 185 selfloop transitions, 34 changer transitions 0/245 dead transitions. [2024-06-03 20:47:43,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 245 transitions, 2878 flow [2024-06-03 20:47:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-03 20:47:43,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:47:43,406 INFO L175 Difference]: Start difference. First operand has 201 places, 220 transitions, 2350 flow. Second operand 10 states and 210 transitions. [2024-06-03 20:47:43,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 245 transitions, 2878 flow [2024-06-03 20:47:43,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 245 transitions, 2829 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:43,604 INFO L231 Difference]: Finished difference. Result has 205 places, 221 transitions, 2393 flow [2024-06-03 20:47:43,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2393, PETRI_PLACES=205, PETRI_TRANSITIONS=221} [2024-06-03 20:47:43,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-03 20:47:43,605 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 221 transitions, 2393 flow [2024-06-03 20:47:43,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:43,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:43,605 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 20:47:43,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:47:43,606 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 20:47:43,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:43,606 INFO L85 PathProgramCache]: Analyzing trace with hash 834898907, now seen corresponding path program 3 times [2024-06-03 20:47:43,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:43,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406267497] [2024-06-03 20:47:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:43,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:43,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:43,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406267497] [2024-06-03 20:47:43,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406267497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:43,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:43,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:43,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029160579] [2024-06-03 20:47:43,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:43,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:43,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:43,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:43,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:43,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:47:43,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 221 transitions, 2393 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:43,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:43,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:47:43,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:44,405 INFO L124 PetriNetUnfolderBase]: 1537/2634 cut-off events. [2024-06-03 20:47:44,405 INFO L125 PetriNetUnfolderBase]: For 119594/119594 co-relation queries the response was YES. [2024-06-03 20:47:44,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15677 conditions, 2634 events. 1537/2634 cut-off events. For 119594/119594 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 15556 event pairs, 308 based on Foata normal form. 10/2640 useless extension candidates. Maximal degree in co-relation 15585. Up to 2256 conditions per place. [2024-06-03 20:47:44,430 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 189 selfloop transitions, 29 changer transitions 0/244 dead transitions. [2024-06-03 20:47:44,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 244 transitions, 2903 flow [2024-06-03 20:47:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:44,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:47:44,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-03 20:47:44,431 INFO L175 Difference]: Start difference. First operand has 205 places, 221 transitions, 2393 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:47:44,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 244 transitions, 2903 flow [2024-06-03 20:47:44,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 244 transitions, 2833 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:44,695 INFO L231 Difference]: Finished difference. Result has 203 places, 221 transitions, 2390 flow [2024-06-03 20:47:44,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2323, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2390, PETRI_PLACES=203, PETRI_TRANSITIONS=221} [2024-06-03 20:47:44,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-03 20:47:44,696 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 221 transitions, 2390 flow [2024-06-03 20:47:44,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:44,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:44,696 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 20:47:44,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:47:44,696 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 20:47:44,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:44,697 INFO L85 PathProgramCache]: Analyzing trace with hash 263096039, now seen corresponding path program 1 times [2024-06-03 20:47:44,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:44,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948732485] [2024-06-03 20:47:44,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:44,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:45,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:45,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948732485] [2024-06-03 20:47:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948732485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:45,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:45,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:45,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450969872] [2024-06-03 20:47:45,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:45,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:45,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:45,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:45,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:45,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:45,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 221 transitions, 2390 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:45,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:45,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:45,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:45,399 INFO L124 PetriNetUnfolderBase]: 1604/2710 cut-off events. [2024-06-03 20:47:45,400 INFO L125 PetriNetUnfolderBase]: For 112618/112618 co-relation queries the response was YES. [2024-06-03 20:47:45,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16120 conditions, 2710 events. 1604/2710 cut-off events. For 112618/112618 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 15764 event pairs, 351 based on Foata normal form. 2/2711 useless extension candidates. Maximal degree in co-relation 16027. Up to 2483 conditions per place. [2024-06-03 20:47:45,423 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 210 selfloop transitions, 21 changer transitions 0/237 dead transitions. [2024-06-03 20:47:45,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 237 transitions, 2914 flow [2024-06-03 20:47:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:45,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-03 20:47:45,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:47:45,424 INFO L175 Difference]: Start difference. First operand has 203 places, 221 transitions, 2390 flow. Second operand 6 states and 132 transitions. [2024-06-03 20:47:45,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 237 transitions, 2914 flow [2024-06-03 20:47:45,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 237 transitions, 2850 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:45,634 INFO L231 Difference]: Finished difference. Result has 204 places, 223 transitions, 2405 flow [2024-06-03 20:47:45,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2405, PETRI_PLACES=204, PETRI_TRANSITIONS=223} [2024-06-03 20:47:45,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-03 20:47:45,634 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 223 transitions, 2405 flow [2024-06-03 20:47:45,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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 20:47:45,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:45,635 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 20:47:45,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:47:45,635 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 20:47:45,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:45,635 INFO L85 PathProgramCache]: Analyzing trace with hash 611465699, now seen corresponding path program 2 times [2024-06-03 20:47:45,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:45,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412087905] [2024-06-03 20:47:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:45,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:45,927 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 20:47:45,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:45,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412087905] [2024-06-03 20:47:45,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412087905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:45,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:45,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:45,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196658748] [2024-06-03 20:47:45,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:45,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:45,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:45,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:45,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:45,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:45,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 223 transitions, 2405 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:45,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:45,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:45,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:46,285 INFO L124 PetriNetUnfolderBase]: 1612/2722 cut-off events. [2024-06-03 20:47:46,285 INFO L125 PetriNetUnfolderBase]: For 116536/116536 co-relation queries the response was YES. [2024-06-03 20:47:46,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16270 conditions, 2722 events. 1612/2722 cut-off events. For 116536/116536 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15823 event pairs, 353 based on Foata normal form. 2/2723 useless extension candidates. Maximal degree in co-relation 16176. Up to 2489 conditions per place. [2024-06-03 20:47:46,309 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 210 selfloop transitions, 22 changer transitions 0/238 dead transitions. [2024-06-03 20:47:46,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 238 transitions, 2933 flow [2024-06-03 20:47:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:46,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-03 20:47:46,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:47:46,310 INFO L175 Difference]: Start difference. First operand has 204 places, 223 transitions, 2405 flow. Second operand 5 states and 115 transitions. [2024-06-03 20:47:46,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 238 transitions, 2933 flow [2024-06-03 20:47:46,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 238 transitions, 2870 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:46,517 INFO L231 Difference]: Finished difference. Result has 205 places, 225 transitions, 2430 flow [2024-06-03 20:47:46,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2430, PETRI_PLACES=205, PETRI_TRANSITIONS=225} [2024-06-03 20:47:46,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-03 20:47:46,518 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 225 transitions, 2430 flow [2024-06-03 20:47:46,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:46,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:46,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:46,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:47:46,518 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 20:47:46,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:46,519 INFO L85 PathProgramCache]: Analyzing trace with hash 620036579, now seen corresponding path program 3 times [2024-06-03 20:47:46,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:46,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371307166] [2024-06-03 20:47:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:46,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:46,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:46,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371307166] [2024-06-03 20:47:46,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371307166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:46,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:46,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:46,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235799682] [2024-06-03 20:47:46,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:46,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:46,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:46,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:46,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:46,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:46,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 225 transitions, 2430 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:46,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:46,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:46,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:47,188 INFO L124 PetriNetUnfolderBase]: 1607/2718 cut-off events. [2024-06-03 20:47:47,188 INFO L125 PetriNetUnfolderBase]: For 117898/117901 co-relation queries the response was YES. [2024-06-03 20:47:47,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16229 conditions, 2718 events. 1607/2718 cut-off events. For 117898/117901 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15860 event pairs, 348 based on Foata normal form. 4/2720 useless extension candidates. Maximal degree in co-relation 16134. Up to 2468 conditions per place. [2024-06-03 20:47:47,212 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 209 selfloop transitions, 23 changer transitions 0/238 dead transitions. [2024-06-03 20:47:47,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 238 transitions, 2956 flow [2024-06-03 20:47:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-03 20:47:47,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-03 20:47:47,213 INFO L175 Difference]: Start difference. First operand has 205 places, 225 transitions, 2430 flow. Second operand 5 states and 112 transitions. [2024-06-03 20:47:47,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 238 transitions, 2956 flow [2024-06-03 20:47:47,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 238 transitions, 2884 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:47,482 INFO L231 Difference]: Finished difference. Result has 207 places, 227 transitions, 2449 flow [2024-06-03 20:47:47,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2362, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2449, PETRI_PLACES=207, PETRI_TRANSITIONS=227} [2024-06-03 20:47:47,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-03 20:47:47,482 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 227 transitions, 2449 flow [2024-06-03 20:47:47,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:47,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:47,483 INFO 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 20:47:47,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:47:47,483 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 20:47:47,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:47,483 INFO L85 PathProgramCache]: Analyzing trace with hash -626812721, now seen corresponding path program 1 times [2024-06-03 20:47:47,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:47,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817390578] [2024-06-03 20:47:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:47,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:47,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:47,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817390578] [2024-06-03 20:47:47,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817390578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:47,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:47,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:47,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239802241] [2024-06-03 20:47:47,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:47,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:47,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:47,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:47,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:47,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 227 transitions, 2449 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:47,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:47,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:47,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:48,294 INFO L124 PetriNetUnfolderBase]: 1726/2911 cut-off events. [2024-06-03 20:47:48,295 INFO L125 PetriNetUnfolderBase]: For 154624/154627 co-relation queries the response was YES. [2024-06-03 20:47:48,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17997 conditions, 2911 events. 1726/2911 cut-off events. For 154624/154627 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 17069 event pairs, 302 based on Foata normal form. 14/2923 useless extension candidates. Maximal degree in co-relation 17901. Up to 2283 conditions per place. [2024-06-03 20:47:48,322 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 79 changer transitions 0/265 dead transitions. [2024-06-03 20:47:48,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 265 transitions, 3261 flow [2024-06-03 20:47:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 20:47:48,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:47:48,324 INFO L175 Difference]: Start difference. First operand has 207 places, 227 transitions, 2449 flow. Second operand 7 states and 175 transitions. [2024-06-03 20:47:48,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 265 transitions, 3261 flow [2024-06-03 20:47:48,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 265 transitions, 3190 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:48,635 INFO L231 Difference]: Finished difference. Result has 211 places, 231 transitions, 2621 flow [2024-06-03 20:47:48,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2621, PETRI_PLACES=211, PETRI_TRANSITIONS=231} [2024-06-03 20:47:48,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-03 20:47:48,636 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 231 transitions, 2621 flow [2024-06-03 20:47:48,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:48,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:48,636 INFO 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 20:47:48,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:47:48,637 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 20:47:48,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:48,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1776753963, now seen corresponding path program 2 times [2024-06-03 20:47:48,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:48,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569771243] [2024-06-03 20:47:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:48,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:48,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:48,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569771243] [2024-06-03 20:47:48,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569771243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:48,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:48,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:48,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646240914] [2024-06-03 20:47:48,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:48,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:48,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:48,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:48,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:48,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:48,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 231 transitions, 2621 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:48,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:48,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:48,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:49,413 INFO L124 PetriNetUnfolderBase]: 1782/2999 cut-off events. [2024-06-03 20:47:49,413 INFO L125 PetriNetUnfolderBase]: For 169026/169029 co-relation queries the response was YES. [2024-06-03 20:47:49,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18912 conditions, 2999 events. 1782/2999 cut-off events. For 169026/169029 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17697 event pairs, 404 based on Foata normal form. 18/3015 useless extension candidates. Maximal degree in co-relation 18815. Up to 2539 conditions per place. [2024-06-03 20:47:49,442 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 181 selfloop transitions, 73 changer transitions 0/260 dead transitions. [2024-06-03 20:47:49,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 260 transitions, 3255 flow [2024-06-03 20:47:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:47:49,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:47:49,443 INFO L175 Difference]: Start difference. First operand has 211 places, 231 transitions, 2621 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:47:49,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 260 transitions, 3255 flow [2024-06-03 20:47:49,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 260 transitions, 3135 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:49,747 INFO L231 Difference]: Finished difference. Result has 215 places, 233 transitions, 2699 flow [2024-06-03 20:47:49,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2501, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2699, PETRI_PLACES=215, PETRI_TRANSITIONS=233} [2024-06-03 20:47:49,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-03 20:47:49,747 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 233 transitions, 2699 flow [2024-06-03 20:47:49,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:49,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:49,748 INFO 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 20:47:49,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:47:49,748 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 20:47:49,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1462456565, now seen corresponding path program 3 times [2024-06-03 20:47:49,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:49,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842883543] [2024-06-03 20:47:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:49,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:50,042 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 20:47:50,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:50,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842883543] [2024-06-03 20:47:50,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842883543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:50,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:50,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:50,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373687627] [2024-06-03 20:47:50,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:50,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:50,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:50,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:50,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:50,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:50,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 233 transitions, 2699 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:50,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:50,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:50,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:50,501 INFO L124 PetriNetUnfolderBase]: 1838/3087 cut-off events. [2024-06-03 20:47:50,501 INFO L125 PetriNetUnfolderBase]: For 176827/176830 co-relation queries the response was YES. [2024-06-03 20:47:50,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19700 conditions, 3087 events. 1838/3087 cut-off events. For 176827/176830 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18326 event pairs, 412 based on Foata normal form. 18/3103 useless extension candidates. Maximal degree in co-relation 19601. Up to 2627 conditions per place. [2024-06-03 20:47:50,532 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 188 selfloop transitions, 62 changer transitions 0/256 dead transitions. [2024-06-03 20:47:50,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 256 transitions, 3313 flow [2024-06-03 20:47:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:47:50,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:47:50,533 INFO L175 Difference]: Start difference. First operand has 215 places, 233 transitions, 2699 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:47:50,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 256 transitions, 3313 flow [2024-06-03 20:47:50,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 256 transitions, 3149 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:50,905 INFO L231 Difference]: Finished difference. Result has 217 places, 235 transitions, 2715 flow [2024-06-03 20:47:50,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2535, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2715, PETRI_PLACES=217, PETRI_TRANSITIONS=235} [2024-06-03 20:47:50,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-03 20:47:50,906 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 235 transitions, 2715 flow [2024-06-03 20:47:50,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:50,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:50,906 INFO 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 20:47:50,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:47:50,906 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 20:47:50,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1619786457, now seen corresponding path program 1 times [2024-06-03 20:47:50,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:50,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914261517] [2024-06-03 20:47:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:50,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:51,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:51,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914261517] [2024-06-03 20:47:51,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914261517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:51,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:51,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:51,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639957412] [2024-06-03 20:47:51,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:51,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:51,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:51,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 235 transitions, 2715 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:51,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:51,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:51,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:51,690 INFO L124 PetriNetUnfolderBase]: 1851/3106 cut-off events. [2024-06-03 20:47:51,690 INFO L125 PetriNetUnfolderBase]: For 158822/158822 co-relation queries the response was YES. [2024-06-03 20:47:51,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19817 conditions, 3106 events. 1851/3106 cut-off events. For 158822/158822 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 18469 event pairs, 411 based on Foata normal form. 1/3103 useless extension candidates. Maximal degree in co-relation 19717. Up to 2642 conditions per place. [2024-06-03 20:47:51,720 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 91 changer transitions 0/273 dead transitions. [2024-06-03 20:47:51,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 273 transitions, 3615 flow [2024-06-03 20:47:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:51,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-03 20:47:51,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-03 20:47:51,721 INFO L175 Difference]: Start difference. First operand has 217 places, 235 transitions, 2715 flow. Second operand 11 states and 241 transitions. [2024-06-03 20:47:51,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 273 transitions, 3615 flow [2024-06-03 20:47:52,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 273 transitions, 3469 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:52,045 INFO L231 Difference]: Finished difference. Result has 223 places, 241 transitions, 2817 flow [2024-06-03 20:47:52,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2817, PETRI_PLACES=223, PETRI_TRANSITIONS=241} [2024-06-03 20:47:52,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-03 20:47:52,046 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 241 transitions, 2817 flow [2024-06-03 20:47:52,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:52,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:52,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:52,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:47:52,047 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 20:47:52,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1619906427, now seen corresponding path program 2 times [2024-06-03 20:47:52,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:52,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402136595] [2024-06-03 20:47:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:52,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:52,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:52,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402136595] [2024-06-03 20:47:52,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402136595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:52,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:52,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:52,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591194724] [2024-06-03 20:47:52,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:52,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:52,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:52,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:52,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:52,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 241 transitions, 2817 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:52,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:52,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:52,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:52,888 INFO L124 PetriNetUnfolderBase]: 1848/3107 cut-off events. [2024-06-03 20:47:52,888 INFO L125 PetriNetUnfolderBase]: For 160686/160689 co-relation queries the response was YES. [2024-06-03 20:47:52,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19709 conditions, 3107 events. 1848/3107 cut-off events. For 160686/160689 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 18502 event pairs, 411 based on Foata normal form. 3/3108 useless extension candidates. Maximal degree in co-relation 19608. Up to 2763 conditions per place. [2024-06-03 20:47:52,916 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 223 selfloop transitions, 37 changer transitions 0/266 dead transitions. [2024-06-03 20:47:52,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 266 transitions, 3401 flow [2024-06-03 20:47:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:47:52,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-03 20:47:52,917 INFO L175 Difference]: Start difference. First operand has 223 places, 241 transitions, 2817 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:47:52,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 266 transitions, 3401 flow [2024-06-03 20:47:53,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 266 transitions, 3222 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:53,343 INFO L231 Difference]: Finished difference. Result has 221 places, 241 transitions, 2722 flow [2024-06-03 20:47:53,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2638, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2722, PETRI_PLACES=221, PETRI_TRANSITIONS=241} [2024-06-03 20:47:53,343 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-03 20:47:53,343 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 241 transitions, 2722 flow [2024-06-03 20:47:53,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:53,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:53,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:53,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:47:53,344 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 20:47:53,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:53,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1625148837, now seen corresponding path program 3 times [2024-06-03 20:47:53,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:53,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636447718] [2024-06-03 20:47:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:53,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:53,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:53,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636447718] [2024-06-03 20:47:53,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636447718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:53,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:53,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:53,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717434845] [2024-06-03 20:47:53,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:53,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:53,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:53,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:53,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:53,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:53,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 241 transitions, 2722 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:53,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:53,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:53,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:54,128 INFO L124 PetriNetUnfolderBase]: 1861/3126 cut-off events. [2024-06-03 20:47:54,128 INFO L125 PetriNetUnfolderBase]: For 167062/167062 co-relation queries the response was YES. [2024-06-03 20:47:54,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19696 conditions, 3126 events. 1861/3126 cut-off events. For 167062/167062 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18621 event pairs, 413 based on Foata normal form. 1/3123 useless extension candidates. Maximal degree in co-relation 19596. Up to 2654 conditions per place. [2024-06-03 20:47:54,158 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 181 selfloop transitions, 89 changer transitions 0/276 dead transitions. [2024-06-03 20:47:54,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 276 transitions, 3634 flow [2024-06-03 20:47:54,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:47:54,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-03 20:47:54,160 INFO L175 Difference]: Start difference. First operand has 221 places, 241 transitions, 2722 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:47:54,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 276 transitions, 3634 flow [2024-06-03 20:47:54,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 276 transitions, 3550 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:54,535 INFO L231 Difference]: Finished difference. Result has 226 places, 247 transitions, 2892 flow [2024-06-03 20:47:54,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2892, PETRI_PLACES=226, PETRI_TRANSITIONS=247} [2024-06-03 20:47:54,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-03 20:47:54,535 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 247 transitions, 2892 flow [2024-06-03 20:47:54,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:54,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:54,536 INFO 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 20:47:54,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:47:54,536 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 20:47:54,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1253554605, now seen corresponding path program 1 times [2024-06-03 20:47:54,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:54,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752140429] [2024-06-03 20:47:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:54,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:54,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:54,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752140429] [2024-06-03 20:47:54,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752140429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:54,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:54,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:54,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125943901] [2024-06-03 20:47:54,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:54,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:54,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:54,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:54,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:54,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:54,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 247 transitions, 2892 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:54,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:54,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:54,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:55,397 INFO L124 PetriNetUnfolderBase]: 1887/3170 cut-off events. [2024-06-03 20:47:55,397 INFO L125 PetriNetUnfolderBase]: For 173048/173048 co-relation queries the response was YES. [2024-06-03 20:47:55,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20215 conditions, 3170 events. 1887/3170 cut-off events. For 173048/173048 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18957 event pairs, 411 based on Foata normal form. 2/3168 useless extension candidates. Maximal degree in co-relation 20115. Up to 2534 conditions per place. [2024-06-03 20:47:55,429 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 120 changer transitions 0/289 dead transitions. [2024-06-03 20:47:55,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 289 transitions, 3952 flow [2024-06-03 20:47:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:47:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:47:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-03 20:47:55,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-03 20:47:55,430 INFO L175 Difference]: Start difference. First operand has 226 places, 247 transitions, 2892 flow. Second operand 12 states and 261 transitions. [2024-06-03 20:47:55,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 289 transitions, 3952 flow [2024-06-03 20:47:55,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 289 transitions, 3793 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:55,855 INFO L231 Difference]: Finished difference. Result has 232 places, 258 transitions, 3157 flow [2024-06-03 20:47:55,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2733, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3157, PETRI_PLACES=232, PETRI_TRANSITIONS=258} [2024-06-03 20:47:55,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-03 20:47:55,855 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 258 transitions, 3157 flow [2024-06-03 20:47:55,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:55,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:55,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:55,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:47:55,856 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 20:47:55,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:55,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1625447367, now seen corresponding path program 4 times [2024-06-03 20:47:55,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:55,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010079421] [2024-06-03 20:47:55,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:55,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:56,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:56,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010079421] [2024-06-03 20:47:56,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010079421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:56,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:56,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:56,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814169627] [2024-06-03 20:47:56,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:56,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:56,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:56,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:56,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:56,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 258 transitions, 3157 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:56,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:56,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:56,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:56,639 INFO L124 PetriNetUnfolderBase]: 1892/3179 cut-off events. [2024-06-03 20:47:56,640 INFO L125 PetriNetUnfolderBase]: For 178960/178960 co-relation queries the response was YES. [2024-06-03 20:47:56,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20912 conditions, 3179 events. 1892/3179 cut-off events. For 178960/178960 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19011 event pairs, 411 based on Foata normal form. 1/3176 useless extension candidates. Maximal degree in co-relation 20810. Up to 2696 conditions per place. [2024-06-03 20:47:56,667 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 88 changer transitions 0/286 dead transitions. [2024-06-03 20:47:56,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 286 transitions, 4049 flow [2024-06-03 20:47:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-03 20:47:56,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-03 20:47:56,668 INFO L175 Difference]: Start difference. First operand has 232 places, 258 transitions, 3157 flow. Second operand 10 states and 217 transitions. [2024-06-03 20:47:56,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 286 transitions, 4049 flow [2024-06-03 20:47:56,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 286 transitions, 3890 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:57,000 INFO L231 Difference]: Finished difference. Result has 236 places, 261 transitions, 3213 flow [2024-06-03 20:47:57,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3213, PETRI_PLACES=236, PETRI_TRANSITIONS=261} [2024-06-03 20:47:57,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-03 20:47:57,001 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 261 transitions, 3213 flow [2024-06-03 20:47:57,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:57,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:57,001 INFO 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 20:47:57,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:47:57,001 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 20:47:57,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1249835907, now seen corresponding path program 5 times [2024-06-03 20:47:57,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:57,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538411488] [2024-06-03 20:47:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:57,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:57,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:57,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538411488] [2024-06-03 20:47:57,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538411488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:57,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:57,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:57,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16559180] [2024-06-03 20:47:57,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:57,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:57,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:57,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:57,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:57,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:57,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 261 transitions, 3213 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:57,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:57,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:57,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:57,798 INFO L124 PetriNetUnfolderBase]: 1889/3172 cut-off events. [2024-06-03 20:47:57,798 INFO L125 PetriNetUnfolderBase]: For 182286/182289 co-relation queries the response was YES. [2024-06-03 20:47:57,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20996 conditions, 3172 events. 1889/3172 cut-off events. For 182286/182289 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 18945 event pairs, 407 based on Foata normal form. 3/3173 useless extension candidates. Maximal degree in co-relation 20892. Up to 2765 conditions per place. [2024-06-03 20:47:57,830 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 228 selfloop transitions, 49 changer transitions 0/283 dead transitions. [2024-06-03 20:47:57,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 283 transitions, 3823 flow [2024-06-03 20:47:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:47:57,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-03 20:47:57,831 INFO L175 Difference]: Start difference. First operand has 236 places, 261 transitions, 3213 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:47:57,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 283 transitions, 3823 flow [2024-06-03 20:47:58,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 283 transitions, 3658 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:58,225 INFO L231 Difference]: Finished difference. Result has 235 places, 261 transitions, 3158 flow [2024-06-03 20:47:58,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3158, PETRI_PLACES=235, PETRI_TRANSITIONS=261} [2024-06-03 20:47:58,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-03 20:47:58,226 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 261 transitions, 3158 flow [2024-06-03 20:47:58,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:58,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:58,226 INFO 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 20:47:58,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:47:58,226 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 20:47:58,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:58,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1249835535, now seen corresponding path program 2 times [2024-06-03 20:47:58,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:58,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718300305] [2024-06-03 20:47:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:58,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:58,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:58,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718300305] [2024-06-03 20:47:58,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718300305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:58,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:58,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:58,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360071577] [2024-06-03 20:47:58,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:58,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:58,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:58,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:58,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:58,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:58,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 261 transitions, 3158 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:58,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:58,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:58,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:59,040 INFO L124 PetriNetUnfolderBase]: 1899/3190 cut-off events. [2024-06-03 20:47:59,041 INFO L125 PetriNetUnfolderBase]: For 189759/189762 co-relation queries the response was YES. [2024-06-03 20:47:59,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21107 conditions, 3190 events. 1899/3190 cut-off events. For 189759/189762 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 19086 event pairs, 410 based on Foata normal form. 4/3192 useless extension candidates. Maximal degree in co-relation 21002. Up to 2730 conditions per place. [2024-06-03 20:47:59,070 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 202 selfloop transitions, 81 changer transitions 0/289 dead transitions. [2024-06-03 20:47:59,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 289 transitions, 3960 flow [2024-06-03 20:47:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:47:59,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-03 20:47:59,071 INFO L175 Difference]: Start difference. First operand has 235 places, 261 transitions, 3158 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:47:59,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 289 transitions, 3960 flow [2024-06-03 20:47:59,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 289 transitions, 3863 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:59,480 INFO L231 Difference]: Finished difference. Result has 237 places, 265 transitions, 3284 flow [2024-06-03 20:47:59,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3063, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3284, PETRI_PLACES=237, PETRI_TRANSITIONS=265} [2024-06-03 20:47:59,481 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-03 20:47:59,481 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 265 transitions, 3284 flow [2024-06-03 20:47:59,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:59,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:59,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:59,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:47:59,482 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 20:47:59,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:59,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1249829955, now seen corresponding path program 3 times [2024-06-03 20:47:59,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:59,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811701414] [2024-06-03 20:47:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:59,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:59,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:59,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811701414] [2024-06-03 20:47:59,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811701414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:59,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:59,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:59,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179581205] [2024-06-03 20:47:59,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:59,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:59,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:59,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:59,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:59,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:59,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 265 transitions, 3284 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:59,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:59,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:59,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:00,468 INFO L124 PetriNetUnfolderBase]: 1909/3208 cut-off events. [2024-06-03 20:48:00,468 INFO L125 PetriNetUnfolderBase]: For 189996/189999 co-relation queries the response was YES. [2024-06-03 20:48:00,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21318 conditions, 3208 events. 1909/3208 cut-off events. For 189996/189999 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19278 event pairs, 410 based on Foata normal form. 4/3210 useless extension candidates. Maximal degree in co-relation 21213. Up to 2742 conditions per place. [2024-06-03 20:48:00,494 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 203 selfloop transitions, 86 changer transitions 0/295 dead transitions. [2024-06-03 20:48:00,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 295 transitions, 4110 flow [2024-06-03 20:48:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-03 20:48:00,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-03 20:48:00,496 INFO L175 Difference]: Start difference. First operand has 237 places, 265 transitions, 3284 flow. Second operand 9 states and 205 transitions. [2024-06-03 20:48:00,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 295 transitions, 4110 flow [2024-06-03 20:48:00,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 295 transitions, 3934 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:00,935 INFO L231 Difference]: Finished difference. Result has 242 places, 269 transitions, 3347 flow [2024-06-03 20:48:00,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3347, PETRI_PLACES=242, PETRI_TRANSITIONS=269} [2024-06-03 20:48:00,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-03 20:48:00,935 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 269 transitions, 3347 flow [2024-06-03 20:48:00,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:00,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:00,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:00,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:48:00,936 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 20:48:00,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:00,937 INFO L85 PathProgramCache]: Analyzing trace with hash -399178587, now seen corresponding path program 4 times [2024-06-03 20:48:00,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:00,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899510310] [2024-06-03 20:48:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:00,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:01,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:01,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899510310] [2024-06-03 20:48:01,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899510310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:01,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:01,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:01,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075400546] [2024-06-03 20:48:01,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:01,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:01,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:01,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:01,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:01,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:01,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 269 transitions, 3347 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:01,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:01,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:01,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:01,787 INFO L124 PetriNetUnfolderBase]: 1951/3278 cut-off events. [2024-06-03 20:48:01,787 INFO L125 PetriNetUnfolderBase]: For 204298/204301 co-relation queries the response was YES. [2024-06-03 20:48:01,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22084 conditions, 3278 events. 1951/3278 cut-off events. For 204298/204301 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 19762 event pairs, 410 based on Foata normal form. 4/3280 useless extension candidates. Maximal degree in co-relation 21978. Up to 2714 conditions per place. [2024-06-03 20:48:01,819 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 199 selfloop transitions, 100 changer transitions 0/305 dead transitions. [2024-06-03 20:48:01,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 305 transitions, 4447 flow [2024-06-03 20:48:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-03 20:48:01,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-03 20:48:01,820 INFO L175 Difference]: Start difference. First operand has 242 places, 269 transitions, 3347 flow. Second operand 9 states and 202 transitions. [2024-06-03 20:48:01,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 305 transitions, 4447 flow [2024-06-03 20:48:02,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 305 transitions, 4235 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:02,315 INFO L231 Difference]: Finished difference. Result has 244 places, 279 transitions, 3474 flow [2024-06-03 20:48:02,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3143, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3474, PETRI_PLACES=244, PETRI_TRANSITIONS=279} [2024-06-03 20:48:02,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-03 20:48:02,316 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 279 transitions, 3474 flow [2024-06-03 20:48:02,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:02,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:02,316 INFO 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 20:48:02,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:48:02,316 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 20:48:02,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:02,316 INFO L85 PathProgramCache]: Analyzing trace with hash -46091899, now seen corresponding path program 1 times [2024-06-03 20:48:02,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:02,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839612054] [2024-06-03 20:48:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:02,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:02,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:02,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839612054] [2024-06-03 20:48:02,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839612054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:02,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:02,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:02,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651762044] [2024-06-03 20:48:02,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:02,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:02,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:02,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:02,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:02,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 279 transitions, 3474 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:02,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:02,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:02,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:03,181 INFO L124 PetriNetUnfolderBase]: 2057/3458 cut-off events. [2024-06-03 20:48:03,181 INFO L125 PetriNetUnfolderBase]: For 251212/251215 co-relation queries the response was YES. [2024-06-03 20:48:03,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23922 conditions, 3458 events. 2057/3458 cut-off events. For 251212/251215 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 21008 event pairs, 428 based on Foata normal form. 14/3470 useless extension candidates. Maximal degree in co-relation 23815. Up to 2708 conditions per place. [2024-06-03 20:48:03,218 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 240 selfloop transitions, 62 changer transitions 0/308 dead transitions. [2024-06-03 20:48:03,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 308 transitions, 4390 flow [2024-06-03 20:48:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:03,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:48:03,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:48:03,219 INFO L175 Difference]: Start difference. First operand has 244 places, 279 transitions, 3474 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:48:03,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 308 transitions, 4390 flow [2024-06-03 20:48:03,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 308 transitions, 4268 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:03,723 INFO L231 Difference]: Finished difference. Result has 248 places, 283 transitions, 3598 flow [2024-06-03 20:48:03,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3598, PETRI_PLACES=248, PETRI_TRANSITIONS=283} [2024-06-03 20:48:03,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-03 20:48:03,723 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 283 transitions, 3598 flow [2024-06-03 20:48:03,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:03,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:03,723 INFO 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 20:48:03,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:48:03,724 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 20:48:03,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:03,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1597852455, now seen corresponding path program 4 times [2024-06-03 20:48:03,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:03,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967999570] [2024-06-03 20:48:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:03,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:04,019 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 20:48:04,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:04,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967999570] [2024-06-03 20:48:04,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967999570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:04,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:04,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:04,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507497014] [2024-06-03 20:48:04,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:04,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:04,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:04,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:04,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:04,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:04,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 283 transitions, 3598 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:04,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:04,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:04,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:04,624 INFO L124 PetriNetUnfolderBase]: 2021/3406 cut-off events. [2024-06-03 20:48:04,624 INFO L125 PetriNetUnfolderBase]: For 236352/236355 co-relation queries the response was YES. [2024-06-03 20:48:04,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23015 conditions, 3406 events. 2021/3406 cut-off events. For 236352/236355 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20686 event pairs, 332 based on Foata normal form. 18/3422 useless extension candidates. Maximal degree in co-relation 22905. Up to 2866 conditions per place. [2024-06-03 20:48:04,657 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 246 selfloop transitions, 60 changer transitions 0/312 dead transitions. [2024-06-03 20:48:04,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 312 transitions, 4304 flow [2024-06-03 20:48:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:04,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 20:48:04,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-03 20:48:04,658 INFO L175 Difference]: Start difference. First operand has 248 places, 283 transitions, 3598 flow. Second operand 6 states and 155 transitions. [2024-06-03 20:48:04,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 312 transitions, 4304 flow [2024-06-03 20:48:05,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 312 transitions, 4180 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:05,250 INFO L231 Difference]: Finished difference. Result has 251 places, 283 transitions, 3607 flow [2024-06-03 20:48:05,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3607, PETRI_PLACES=251, PETRI_TRANSITIONS=283} [2024-06-03 20:48:05,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-03 20:48:05,250 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 283 transitions, 3607 flow [2024-06-03 20:48:05,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:05,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:05,250 INFO 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 20:48:05,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:48:05,251 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 20:48:05,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:05,251 INFO L85 PathProgramCache]: Analyzing trace with hash 961723539, now seen corresponding path program 5 times [2024-06-03 20:48:05,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:05,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431137485] [2024-06-03 20:48:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:05,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:05,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:05,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431137485] [2024-06-03 20:48:05,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431137485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:05,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:05,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:05,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701171843] [2024-06-03 20:48:05,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:05,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:05,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:05,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:05,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:05,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:05,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 283 transitions, 3607 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:05,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:05,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:05,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:06,154 INFO L124 PetriNetUnfolderBase]: 2145/3600 cut-off events. [2024-06-03 20:48:06,154 INFO L125 PetriNetUnfolderBase]: For 216283/216283 co-relation queries the response was YES. [2024-06-03 20:48:06,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24585 conditions, 3600 events. 2145/3600 cut-off events. For 216283/216283 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22109 event pairs, 447 based on Foata normal form. 1/3594 useless extension candidates. Maximal degree in co-relation 24473. Up to 3055 conditions per place. [2024-06-03 20:48:06,193 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 257 selfloop transitions, 104 changer transitions 0/367 dead transitions. [2024-06-03 20:48:06,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 367 transitions, 5521 flow [2024-06-03 20:48:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:48:06,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-03 20:48:06,194 INFO L175 Difference]: Start difference. First operand has 251 places, 283 transitions, 3607 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:48:06,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 367 transitions, 5521 flow [2024-06-03 20:48:06,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 367 transitions, 5355 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:06,733 INFO L231 Difference]: Finished difference. Result has 260 places, 330 transitions, 4509 flow [2024-06-03 20:48:06,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4509, PETRI_PLACES=260, PETRI_TRANSITIONS=330} [2024-06-03 20:48:06,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-03 20:48:06,733 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 330 transitions, 4509 flow [2024-06-03 20:48:06,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:06,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:06,734 INFO 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 20:48:06,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:48:06,734 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 20:48:06,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:06,734 INFO L85 PathProgramCache]: Analyzing trace with hash -818202721, now seen corresponding path program 6 times [2024-06-03 20:48:06,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:06,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346159440] [2024-06-03 20:48:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:06,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:07,018 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 20:48:07,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:07,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346159440] [2024-06-03 20:48:07,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346159440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:07,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:07,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:07,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662075801] [2024-06-03 20:48:07,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:07,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:07,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:07,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:07,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:07,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:07,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 330 transitions, 4509 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:07,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:07,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:07,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:07,683 INFO L124 PetriNetUnfolderBase]: 2155/3622 cut-off events. [2024-06-03 20:48:07,683 INFO L125 PetriNetUnfolderBase]: For 224931/224931 co-relation queries the response was YES. [2024-06-03 20:48:07,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25120 conditions, 3622 events. 2155/3622 cut-off events. For 224931/224931 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22328 event pairs, 448 based on Foata normal form. 2/3619 useless extension candidates. Maximal degree in co-relation 25004. Up to 3079 conditions per place. [2024-06-03 20:48:07,722 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 248 selfloop transitions, 113 changer transitions 0/367 dead transitions. [2024-06-03 20:48:07,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 367 transitions, 5849 flow [2024-06-03 20:48:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-03 20:48:07,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-03 20:48:07,723 INFO L175 Difference]: Start difference. First operand has 260 places, 330 transitions, 4509 flow. Second operand 9 states and 200 transitions. [2024-06-03 20:48:07,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 367 transitions, 5849 flow [2024-06-03 20:48:08,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 367 transitions, 5700 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:08,351 INFO L231 Difference]: Finished difference. Result has 265 places, 343 transitions, 4918 flow [2024-06-03 20:48:08,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4382, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4918, PETRI_PLACES=265, PETRI_TRANSITIONS=343} [2024-06-03 20:48:08,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-03 20:48:08,351 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 343 transitions, 4918 flow [2024-06-03 20:48:08,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:08,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:08,352 INFO 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 20:48:08,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:48:08,352 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 20:48:08,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:08,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1455437297, now seen corresponding path program 7 times [2024-06-03 20:48:08,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:08,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003419915] [2024-06-03 20:48:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:08,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:08,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:08,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003419915] [2024-06-03 20:48:08,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003419915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:08,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:08,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:08,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609096276] [2024-06-03 20:48:08,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:08,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:08,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:08,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:08,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:08,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 343 transitions, 4918 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:08,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:08,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:08,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:09,315 INFO L124 PetriNetUnfolderBase]: 2149/3614 cut-off events. [2024-06-03 20:48:09,315 INFO L125 PetriNetUnfolderBase]: For 226953/226953 co-relation queries the response was YES. [2024-06-03 20:48:09,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25272 conditions, 3614 events. 2149/3614 cut-off events. For 226953/226953 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22303 event pairs, 448 based on Foata normal form. 2/3611 useless extension candidates. Maximal degree in co-relation 25153. Up to 3073 conditions per place. [2024-06-03 20:48:09,357 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 112 changer transitions 0/364 dead transitions. [2024-06-03 20:48:09,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 364 transitions, 5822 flow [2024-06-03 20:48:09,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:09,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:48:09,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-03 20:48:09,358 INFO L175 Difference]: Start difference. First operand has 265 places, 343 transitions, 4918 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:48:09,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 364 transitions, 5822 flow [2024-06-03 20:48:10,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 364 transitions, 5547 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:10,079 INFO L231 Difference]: Finished difference. Result has 268 places, 343 transitions, 4876 flow [2024-06-03 20:48:10,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4643, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4876, PETRI_PLACES=268, PETRI_TRANSITIONS=343} [2024-06-03 20:48:10,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-03 20:48:10,079 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 343 transitions, 4876 flow [2024-06-03 20:48:10,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:10,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:10,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:10,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:48:10,080 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 20:48:10,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:10,080 INFO L85 PathProgramCache]: Analyzing trace with hash -73579617, now seen corresponding path program 6 times [2024-06-03 20:48:10,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:10,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676021075] [2024-06-03 20:48:10,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:10,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:10,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:10,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676021075] [2024-06-03 20:48:10,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676021075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:10,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:10,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:10,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954775099] [2024-06-03 20:48:10,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:10,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:10,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:10,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:10,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:10,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:10,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 343 transitions, 4876 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:10,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:10,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:10,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:11,074 INFO L124 PetriNetUnfolderBase]: 2154/3632 cut-off events. [2024-06-03 20:48:11,074 INFO L125 PetriNetUnfolderBase]: For 230500/230503 co-relation queries the response was YES. [2024-06-03 20:48:11,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25505 conditions, 3632 events. 2154/3632 cut-off events. For 230500/230503 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22486 event pairs, 451 based on Foata normal form. 3/3627 useless extension candidates. Maximal degree in co-relation 25384. Up to 3047 conditions per place. [2024-06-03 20:48:11,108 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 265 selfloop transitions, 100 changer transitions 0/371 dead transitions. [2024-06-03 20:48:11,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 371 transitions, 5844 flow [2024-06-03 20:48:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:11,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-03 20:48:11,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-03 20:48:11,110 INFO L175 Difference]: Start difference. First operand has 268 places, 343 transitions, 4876 flow. Second operand 11 states and 230 transitions. [2024-06-03 20:48:11,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 371 transitions, 5844 flow [2024-06-03 20:48:11,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 371 transitions, 5616 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:11,709 INFO L231 Difference]: Finished difference. Result has 273 places, 346 transitions, 4894 flow [2024-06-03 20:48:11,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4648, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4894, PETRI_PLACES=273, PETRI_TRANSITIONS=346} [2024-06-03 20:48:11,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-03 20:48:11,710 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 346 transitions, 4894 flow [2024-06-03 20:48:11,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:11,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:11,710 INFO 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 20:48:11,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:48:11,711 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 20:48:11,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:11,711 INFO L85 PathProgramCache]: Analyzing trace with hash -563275775, now seen corresponding path program 7 times [2024-06-03 20:48:11,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:11,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877417854] [2024-06-03 20:48:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:11,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:11,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:11,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877417854] [2024-06-03 20:48:11,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877417854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:11,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:11,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:11,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300713963] [2024-06-03 20:48:11,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:11,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:11,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:11,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:11,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:12,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:12,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 346 transitions, 4894 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:12,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:12,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:12,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:12,575 INFO L124 PetriNetUnfolderBase]: 2159/3641 cut-off events. [2024-06-03 20:48:12,575 INFO L125 PetriNetUnfolderBase]: For 235872/235875 co-relation queries the response was YES. [2024-06-03 20:48:12,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25639 conditions, 3641 events. 2159/3641 cut-off events. For 235872/235875 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22557 event pairs, 452 based on Foata normal form. 3/3636 useless extension candidates. Maximal degree in co-relation 25517. Up to 3053 conditions per place. [2024-06-03 20:48:12,616 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 265 selfloop transitions, 99 changer transitions 0/370 dead transitions. [2024-06-03 20:48:12,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 370 transitions, 5858 flow [2024-06-03 20:48:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-03 20:48:12,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-03 20:48:12,617 INFO L175 Difference]: Start difference. First operand has 273 places, 346 transitions, 4894 flow. Second operand 10 states and 213 transitions. [2024-06-03 20:48:12,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 370 transitions, 5858 flow [2024-06-03 20:48:13,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 370 transitions, 5671 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:13,402 INFO L231 Difference]: Finished difference. Result has 277 places, 349 transitions, 4957 flow [2024-06-03 20:48:13,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4718, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4957, PETRI_PLACES=277, PETRI_TRANSITIONS=349} [2024-06-03 20:48:13,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-03 20:48:13,403 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 349 transitions, 4957 flow [2024-06-03 20:48:13,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:13,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:13,403 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] [2024-06-03 20:48:13,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:48:13,403 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 20:48:13,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash -563275403, now seen corresponding path program 8 times [2024-06-03 20:48:13,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:13,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416251304] [2024-06-03 20:48:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:13,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:13,759 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 20:48:13,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:13,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416251304] [2024-06-03 20:48:13,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416251304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:13,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:13,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:13,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107203728] [2024-06-03 20:48:13,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:13,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:13,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:13,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:13,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:13,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:13,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 349 transitions, 4957 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:13,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:13,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:13,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:14,475 INFO L124 PetriNetUnfolderBase]: 2164/3637 cut-off events. [2024-06-03 20:48:14,475 INFO L125 PetriNetUnfolderBase]: For 242103/242103 co-relation queries the response was YES. [2024-06-03 20:48:14,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25775 conditions, 3637 events. 2164/3637 cut-off events. For 242103/242103 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22457 event pairs, 447 based on Foata normal form. 1/3631 useless extension candidates. Maximal degree in co-relation 25651. Up to 3081 conditions per place. [2024-06-03 20:48:14,519 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 269 selfloop transitions, 114 changer transitions 0/389 dead transitions. [2024-06-03 20:48:14,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 389 transitions, 6332 flow [2024-06-03 20:48:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:48:14,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-03 20:48:14,520 INFO L175 Difference]: Start difference. First operand has 277 places, 349 transitions, 4957 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:48:14,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 389 transitions, 6332 flow [2024-06-03 20:48:15,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 389 transitions, 6128 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:15,300 INFO L231 Difference]: Finished difference. Result has 282 places, 356 transitions, 5169 flow [2024-06-03 20:48:15,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5169, PETRI_PLACES=282, PETRI_TRANSITIONS=356} [2024-06-03 20:48:15,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-03 20:48:15,301 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 356 transitions, 5169 flow [2024-06-03 20:48:15,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:15,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:15,301 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] [2024-06-03 20:48:15,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:48:15,301 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 20:48:15,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash 832727315, now seen corresponding path program 8 times [2024-06-03 20:48:15,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:15,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133565448] [2024-06-03 20:48:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:15,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:15,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:15,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133565448] [2024-06-03 20:48:15,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133565448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:15,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:15,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:15,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774598878] [2024-06-03 20:48:15,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:15,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:15,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:15,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:15,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:15,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:15,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 356 transitions, 5169 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:15,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:15,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:15,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:16,191 INFO L124 PetriNetUnfolderBase]: 2169/3661 cut-off events. [2024-06-03 20:48:16,191 INFO L125 PetriNetUnfolderBase]: For 249297/249300 co-relation queries the response was YES. [2024-06-03 20:48:16,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26012 conditions, 3661 events. 2169/3661 cut-off events. For 249297/249300 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22772 event pairs, 454 based on Foata normal form. 3/3656 useless extension candidates. Maximal degree in co-relation 25886. Up to 3066 conditions per place. [2024-06-03 20:48:16,229 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 269 selfloop transitions, 101 changer transitions 0/376 dead transitions. [2024-06-03 20:48:16,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 376 transitions, 6131 flow [2024-06-03 20:48:16,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-03 20:48:16,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-03 20:48:16,230 INFO L175 Difference]: Start difference. First operand has 282 places, 356 transitions, 5169 flow. Second operand 9 states and 192 transitions. [2024-06-03 20:48:16,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 376 transitions, 6131 flow [2024-06-03 20:48:16,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 376 transitions, 5945 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:16,937 INFO L231 Difference]: Finished difference. Result has 285 places, 359 transitions, 5229 flow [2024-06-03 20:48:16,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4983, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5229, PETRI_PLACES=285, PETRI_TRANSITIONS=359} [2024-06-03 20:48:16,938 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-03 20:48:16,938 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 359 transitions, 5229 flow [2024-06-03 20:48:16,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:16,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:16,938 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] [2024-06-03 20:48:16,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:48:16,938 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 20:48:16,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:16,939 INFO L85 PathProgramCache]: Analyzing trace with hash -208596653, now seen corresponding path program 9 times [2024-06-03 20:48:16,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:16,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182237781] [2024-06-03 20:48:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:16,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:17,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:17,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182237781] [2024-06-03 20:48:17,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182237781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:17,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:17,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:17,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973561761] [2024-06-03 20:48:17,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:17,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:17,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:17,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:17,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:17,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:17,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 359 transitions, 5229 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:17,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:17,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:17,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:17,868 INFO L124 PetriNetUnfolderBase]: 2174/3667 cut-off events. [2024-06-03 20:48:17,868 INFO L125 PetriNetUnfolderBase]: For 254371/254371 co-relation queries the response was YES. [2024-06-03 20:48:17,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26121 conditions, 3667 events. 2174/3667 cut-off events. For 254371/254371 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22700 event pairs, 420 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 25994. Up to 3325 conditions per place. [2024-06-03 20:48:17,911 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 349 selfloop transitions, 29 changer transitions 0/384 dead transitions. [2024-06-03 20:48:17,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 384 transitions, 6117 flow [2024-06-03 20:48:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:17,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-03 20:48:17,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902439024390244 [2024-06-03 20:48:17,912 INFO L175 Difference]: Start difference. First operand has 285 places, 359 transitions, 5229 flow. Second operand 10 states and 201 transitions. [2024-06-03 20:48:17,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 384 transitions, 6117 flow [2024-06-03 20:48:18,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 384 transitions, 5874 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:18,842 INFO L231 Difference]: Finished difference. Result has 288 places, 362 transitions, 5113 flow [2024-06-03 20:48:18,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4989, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5113, PETRI_PLACES=288, PETRI_TRANSITIONS=362} [2024-06-03 20:48:18,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-03 20:48:18,842 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 362 transitions, 5113 flow [2024-06-03 20:48:18,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:18,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:18,842 INFO 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 20:48:18,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:48:18,842 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 20:48:18,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:18,843 INFO L85 PathProgramCache]: Analyzing trace with hash 280982325, now seen corresponding path program 10 times [2024-06-03 20:48:18,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:18,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825064020] [2024-06-03 20:48:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:18,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:19,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:19,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825064020] [2024-06-03 20:48:19,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825064020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:19,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:19,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:19,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464243060] [2024-06-03 20:48:19,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:19,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:19,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:19,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:19,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:19,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 362 transitions, 5113 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:19,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:19,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:19,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:19,733 INFO L124 PetriNetUnfolderBase]: 2179/3665 cut-off events. [2024-06-03 20:48:19,733 INFO L125 PetriNetUnfolderBase]: For 260186/260186 co-relation queries the response was YES. [2024-06-03 20:48:19,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25869 conditions, 3665 events. 2179/3665 cut-off events. For 260186/260186 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22636 event pairs, 449 based on Foata normal form. 1/3659 useless extension candidates. Maximal degree in co-relation 25742. Up to 2810 conditions per place. [2024-06-03 20:48:19,775 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 153 selfloop transitions, 232 changer transitions 0/391 dead transitions. [2024-06-03 20:48:19,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 391 transitions, 6359 flow [2024-06-03 20:48:19,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-03 20:48:19,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-03 20:48:19,777 INFO L175 Difference]: Start difference. First operand has 288 places, 362 transitions, 5113 flow. Second operand 11 states and 241 transitions. [2024-06-03 20:48:19,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 391 transitions, 6359 flow [2024-06-03 20:48:20,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 391 transitions, 6267 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:20,535 INFO L231 Difference]: Finished difference. Result has 294 places, 368 transitions, 5705 flow [2024-06-03 20:48:20,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5021, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5705, PETRI_PLACES=294, PETRI_TRANSITIONS=368} [2024-06-03 20:48:20,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-03 20:48:20,536 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 368 transitions, 5705 flow [2024-06-03 20:48:20,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:20,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:20,536 INFO 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 20:48:20,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:48:20,536 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 20:48:20,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:20,536 INFO L85 PathProgramCache]: Analyzing trace with hash -434417761, now seen corresponding path program 11 times [2024-06-03 20:48:20,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:20,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317067558] [2024-06-03 20:48:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:20,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:20,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:20,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317067558] [2024-06-03 20:48:20,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317067558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:20,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:20,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:20,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999921447] [2024-06-03 20:48:20,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:20,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:20,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:20,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:20,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:20,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:20,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 368 transitions, 5705 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:20,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:20,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:20,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:21,519 INFO L124 PetriNetUnfolderBase]: 2202/3714 cut-off events. [2024-06-03 20:48:21,519 INFO L125 PetriNetUnfolderBase]: For 275320/275320 co-relation queries the response was YES. [2024-06-03 20:48:21,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27162 conditions, 3714 events. 2202/3714 cut-off events. For 275320/275320 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 23105 event pairs, 421 based on Foata normal form. 2/3715 useless extension candidates. Maximal degree in co-relation 27033. Up to 3327 conditions per place. [2024-06-03 20:48:21,561 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 335 selfloop transitions, 59 changer transitions 0/400 dead transitions. [2024-06-03 20:48:21,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 400 transitions, 6946 flow [2024-06-03 20:48:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-03 20:48:21,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-03 20:48:21,562 INFO L175 Difference]: Start difference. First operand has 294 places, 368 transitions, 5705 flow. Second operand 9 states and 190 transitions. [2024-06-03 20:48:21,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 400 transitions, 6946 flow [2024-06-03 20:48:22,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 400 transitions, 6586 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:22,559 INFO L231 Difference]: Finished difference. Result has 297 places, 380 transitions, 5762 flow [2024-06-03 20:48:22,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5762, PETRI_PLACES=297, PETRI_TRANSITIONS=380} [2024-06-03 20:48:22,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-03 20:48:22,560 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 380 transitions, 5762 flow [2024-06-03 20:48:22,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:22,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:22,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:22,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:48:22,560 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 20:48:22,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:22,561 INFO L85 PathProgramCache]: Analyzing trace with hash 117564751, now seen corresponding path program 12 times [2024-06-03 20:48:22,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:22,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68122746] [2024-06-03 20:48:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:22,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:22,870 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 20:48:22,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:22,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68122746] [2024-06-03 20:48:22,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68122746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:22,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:22,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:22,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786780587] [2024-06-03 20:48:22,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:22,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:22,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:22,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:22,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:22,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:22,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 380 transitions, 5762 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:22,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:22,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:22,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:23,571 INFO L124 PetriNetUnfolderBase]: 2222/3740 cut-off events. [2024-06-03 20:48:23,571 INFO L125 PetriNetUnfolderBase]: For 281671/281671 co-relation queries the response was YES. [2024-06-03 20:48:23,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27058 conditions, 3740 events. 2222/3740 cut-off events. For 281671/281671 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 23247 event pairs, 419 based on Foata normal form. 2/3741 useless extension candidates. Maximal degree in co-relation 26928. Up to 3347 conditions per place. [2024-06-03 20:48:23,618 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 71 changer transitions 0/414 dead transitions. [2024-06-03 20:48:23,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 414 transitions, 7029 flow [2024-06-03 20:48:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-03 20:48:23,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49667405764966743 [2024-06-03 20:48:23,619 INFO L175 Difference]: Start difference. First operand has 297 places, 380 transitions, 5762 flow. Second operand 11 states and 224 transitions. [2024-06-03 20:48:23,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 414 transitions, 7029 flow [2024-06-03 20:48:24,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 414 transitions, 6877 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:24,511 INFO L231 Difference]: Finished difference. Result has 304 places, 392 transitions, 6009 flow [2024-06-03 20:48:24,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6009, PETRI_PLACES=304, PETRI_TRANSITIONS=392} [2024-06-03 20:48:24,512 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-03 20:48:24,512 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 392 transitions, 6009 flow [2024-06-03 20:48:24,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:24,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:24,512 INFO 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 20:48:24,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:48:24,512 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 20:48:24,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:24,513 INFO L85 PathProgramCache]: Analyzing trace with hash -938278935, now seen corresponding path program 9 times [2024-06-03 20:48:24,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:24,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703728662] [2024-06-03 20:48:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:24,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:24,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:24,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703728662] [2024-06-03 20:48:24,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703728662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:24,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:24,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:24,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473687432] [2024-06-03 20:48:24,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:24,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:24,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:24,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:24,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:24,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:24,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 392 transitions, 6009 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:24,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:24,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:24,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:25,416 INFO L124 PetriNetUnfolderBase]: 2219/3739 cut-off events. [2024-06-03 20:48:25,416 INFO L125 PetriNetUnfolderBase]: For 284415/284418 co-relation queries the response was YES. [2024-06-03 20:48:25,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27024 conditions, 3739 events. 2219/3739 cut-off events. For 284415/284418 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 23316 event pairs, 463 based on Foata normal form. 3/3734 useless extension candidates. Maximal degree in co-relation 26893. Up to 3175 conditions per place. [2024-06-03 20:48:25,458 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 335 selfloop transitions, 70 changer transitions 0/411 dead transitions. [2024-06-03 20:48:25,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 411 transitions, 6867 flow [2024-06-03 20:48:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 20:48:25,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-03 20:48:25,459 INFO L175 Difference]: Start difference. First operand has 304 places, 392 transitions, 6009 flow. Second operand 6 states and 143 transitions. [2024-06-03 20:48:25,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 411 transitions, 6867 flow [2024-06-03 20:48:26,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 411 transitions, 6653 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:26,364 INFO L231 Difference]: Finished difference. Result has 302 places, 392 transitions, 5946 flow [2024-06-03 20:48:26,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5795, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5946, PETRI_PLACES=302, PETRI_TRANSITIONS=392} [2024-06-03 20:48:26,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-03 20:48:26,365 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 392 transitions, 5946 flow [2024-06-03 20:48:26,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:26,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:26,365 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] [2024-06-03 20:48:26,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:48:26,365 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 20:48:26,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1013798475, now seen corresponding path program 13 times [2024-06-03 20:48:26,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:26,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50276488] [2024-06-03 20:48:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:26,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:26,663 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 20:48:26,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:26,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50276488] [2024-06-03 20:48:26,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50276488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:26,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:26,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:26,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504036911] [2024-06-03 20:48:26,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:26,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:26,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:26,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:26,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:26,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:26,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 392 transitions, 5946 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:26,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:26,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:26,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:27,299 INFO L124 PetriNetUnfolderBase]: 2221/3735 cut-off events. [2024-06-03 20:48:27,299 INFO L125 PetriNetUnfolderBase]: For 290330/290330 co-relation queries the response was YES. [2024-06-03 20:48:27,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27086 conditions, 3735 events. 2221/3735 cut-off events. For 290330/290330 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 23184 event pairs, 448 based on Foata normal form. 2/3732 useless extension candidates. Maximal degree in co-relation 26954. Up to 3037 conditions per place. [2024-06-03 20:48:27,342 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 197 changer transitions 0/417 dead transitions. [2024-06-03 20:48:27,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 417 transitions, 7203 flow [2024-06-03 20:48:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:48:27,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:48:27,343 INFO L175 Difference]: Start difference. First operand has 302 places, 392 transitions, 5946 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:48:27,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 417 transitions, 7203 flow [2024-06-03 20:48:28,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 417 transitions, 7062 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:28,185 INFO L231 Difference]: Finished difference. Result has 304 places, 395 transitions, 6281 flow [2024-06-03 20:48:28,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6281, PETRI_PLACES=304, PETRI_TRANSITIONS=395} [2024-06-03 20:48:28,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-03 20:48:28,185 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 395 transitions, 6281 flow [2024-06-03 20:48:28,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:28,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:28,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:28,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:48:28,186 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 20:48:28,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:28,186 INFO L85 PathProgramCache]: Analyzing trace with hash 112202371, now seen corresponding path program 14 times [2024-06-03 20:48:28,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:28,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510139275] [2024-06-03 20:48:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:28,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:28,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:28,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510139275] [2024-06-03 20:48:28,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510139275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:28,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:28,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:28,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364806810] [2024-06-03 20:48:28,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:28,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:28,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:28,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:28,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:28,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:28,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 395 transitions, 6281 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:28,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:28,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:28,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:29,263 INFO L124 PetriNetUnfolderBase]: 2215/3733 cut-off events. [2024-06-03 20:48:29,263 INFO L125 PetriNetUnfolderBase]: For 284288/284288 co-relation queries the response was YES. [2024-06-03 20:48:29,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27167 conditions, 3733 events. 2215/3733 cut-off events. For 284288/284288 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 23257 event pairs, 419 based on Foata normal form. 2/3734 useless extension candidates. Maximal degree in co-relation 27035. Up to 3358 conditions per place. [2024-06-03 20:48:29,300 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 354 selfloop transitions, 52 changer transitions 0/412 dead transitions. [2024-06-03 20:48:29,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 412 transitions, 7135 flow [2024-06-03 20:48:29,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 20:48:29,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:48:29,301 INFO L175 Difference]: Start difference. First operand has 304 places, 395 transitions, 6281 flow. Second operand 7 states and 154 transitions. [2024-06-03 20:48:29,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 412 transitions, 7135 flow [2024-06-03 20:48:30,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 412 transitions, 6577 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:30,456 INFO L231 Difference]: Finished difference. Result has 306 places, 395 transitions, 5837 flow [2024-06-03 20:48:30,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5723, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5837, PETRI_PLACES=306, PETRI_TRANSITIONS=395} [2024-06-03 20:48:30,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-03 20:48:30,456 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 395 transitions, 5837 flow [2024-06-03 20:48:30,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:30,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:30,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:30,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:48:30,457 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 20:48:30,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:30,457 INFO L85 PathProgramCache]: Analyzing trace with hash -807350927, now seen corresponding path program 15 times [2024-06-03 20:48:30,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:30,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274671434] [2024-06-03 20:48:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:30,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:30,741 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 20:48:30,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:30,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274671434] [2024-06-03 20:48:30,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274671434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:30,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:30,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:30,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913994604] [2024-06-03 20:48:30,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:30,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:30,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:30,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:30,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:30,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:30,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 395 transitions, 5837 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:30,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:30,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:30,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:31,464 INFO L124 PetriNetUnfolderBase]: 2272/3830 cut-off events. [2024-06-03 20:48:31,464 INFO L125 PetriNetUnfolderBase]: For 287054/287057 co-relation queries the response was YES. [2024-06-03 20:48:31,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27282 conditions, 3830 events. 2272/3830 cut-off events. For 287054/287057 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23995 event pairs, 428 based on Foata normal form. 4/3832 useless extension candidates. Maximal degree in co-relation 27150. Up to 3159 conditions per place. [2024-06-03 20:48:31,509 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 136 changer transitions 0/452 dead transitions. [2024-06-03 20:48:31,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 452 transitions, 7542 flow [2024-06-03 20:48:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:31,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-03 20:48:31,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-03 20:48:31,510 INFO L175 Difference]: Start difference. First operand has 306 places, 395 transitions, 5837 flow. Second operand 7 states and 174 transitions. [2024-06-03 20:48:31,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 452 transitions, 7542 flow [2024-06-03 20:48:32,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 452 transitions, 7404 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:32,517 INFO L231 Difference]: Finished difference. Result has 309 places, 420 transitions, 6624 flow [2024-06-03 20:48:32,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5699, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6624, PETRI_PLACES=309, PETRI_TRANSITIONS=420} [2024-06-03 20:48:32,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-03 20:48:32,517 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 420 transitions, 6624 flow [2024-06-03 20:48:32,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:32,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:32,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:32,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:48:32,518 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 20:48:32,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:32,518 INFO L85 PathProgramCache]: Analyzing trace with hash -800684687, now seen corresponding path program 16 times [2024-06-03 20:48:32,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:32,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858520157] [2024-06-03 20:48:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:32,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:32,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:32,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858520157] [2024-06-03 20:48:32,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858520157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:32,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:32,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:32,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310137893] [2024-06-03 20:48:32,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:32,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:32,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:32,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:32,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 420 transitions, 6624 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:32,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:32,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:32,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:33,617 INFO L124 PetriNetUnfolderBase]: 2269/3825 cut-off events. [2024-06-03 20:48:33,617 INFO L125 PetriNetUnfolderBase]: For 288715/288715 co-relation queries the response was YES. [2024-06-03 20:48:33,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27864 conditions, 3825 events. 2269/3825 cut-off events. For 288715/288715 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23936 event pairs, 419 based on Foata normal form. 1/3825 useless extension candidates. Maximal degree in co-relation 27729. Up to 3157 conditions per place. [2024-06-03 20:48:33,667 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 165 changer transitions 0/461 dead transitions. [2024-06-03 20:48:33,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 461 transitions, 8056 flow [2024-06-03 20:48:33,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-03 20:48:33,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-03 20:48:33,668 INFO L175 Difference]: Start difference. First operand has 309 places, 420 transitions, 6624 flow. Second operand 9 states and 218 transitions. [2024-06-03 20:48:33,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 461 transitions, 8056 flow [2024-06-03 20:48:34,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 461 transitions, 7813 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:34,723 INFO L231 Difference]: Finished difference. Result has 315 places, 423 transitions, 6907 flow [2024-06-03 20:48:34,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6381, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6907, PETRI_PLACES=315, PETRI_TRANSITIONS=423} [2024-06-03 20:48:34,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-03 20:48:34,724 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 423 transitions, 6907 flow [2024-06-03 20:48:34,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:34,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:34,724 INFO 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 20:48:34,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:48:34,724 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 20:48:34,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1448084797, now seen corresponding path program 17 times [2024-06-03 20:48:34,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:34,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363138789] [2024-06-03 20:48:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:34,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:35,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:35,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363138789] [2024-06-03 20:48:35,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363138789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:35,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:35,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:35,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23993172] [2024-06-03 20:48:35,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:35,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:35,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:35,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:35,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:35,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 423 transitions, 6907 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:35,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:35,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:35,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:35,793 INFO L124 PetriNetUnfolderBase]: 2266/3821 cut-off events. [2024-06-03 20:48:35,793 INFO L125 PetriNetUnfolderBase]: For 292722/292722 co-relation queries the response was YES. [2024-06-03 20:48:35,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28137 conditions, 3821 events. 2266/3821 cut-off events. For 292722/292722 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23952 event pairs, 419 based on Foata normal form. 1/3821 useless extension candidates. Maximal degree in co-relation 27999. Up to 3155 conditions per place. [2024-06-03 20:48:35,835 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 162 changer transitions 0/460 dead transitions. [2024-06-03 20:48:35,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 460 transitions, 8099 flow [2024-06-03 20:48:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-03 20:48:35,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-03 20:48:35,837 INFO L175 Difference]: Start difference. First operand has 315 places, 423 transitions, 6907 flow. Second operand 9 states and 218 transitions. [2024-06-03 20:48:35,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 460 transitions, 8099 flow [2024-06-03 20:48:36,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 460 transitions, 7849 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:36,984 INFO L231 Difference]: Finished difference. Result has 316 places, 423 transitions, 7012 flow [2024-06-03 20:48:36,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6663, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7012, PETRI_PLACES=316, PETRI_TRANSITIONS=423} [2024-06-03 20:48:36,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-03 20:48:36,984 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 423 transitions, 7012 flow [2024-06-03 20:48:36,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:36,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:36,985 INFO 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 20:48:36,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:48:36,985 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 20:48:36,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1166082957, now seen corresponding path program 2 times [2024-06-03 20:48:36,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:36,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125559051] [2024-06-03 20:48:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:36,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:37,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:37,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125559051] [2024-06-03 20:48:37,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125559051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:37,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:37,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:37,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830802821] [2024-06-03 20:48:37,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:37,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:37,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:37,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:37,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:37,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:37,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 423 transitions, 7012 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:37,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:37,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:37,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:38,057 INFO L124 PetriNetUnfolderBase]: 2372/3998 cut-off events. [2024-06-03 20:48:38,057 INFO L125 PetriNetUnfolderBase]: For 349044/349047 co-relation queries the response was YES. [2024-06-03 20:48:38,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30001 conditions, 3998 events. 2372/3998 cut-off events. For 349044/349047 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25084 event pairs, 341 based on Foata normal form. 14/4010 useless extension candidates. Maximal degree in co-relation 29865. Up to 3111 conditions per place. [2024-06-03 20:48:38,112 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 375 selfloop transitions, 73 changer transitions 0/454 dead transitions. [2024-06-03 20:48:38,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 454 transitions, 8266 flow [2024-06-03 20:48:38,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 20:48:38,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:48:38,113 INFO L175 Difference]: Start difference. First operand has 316 places, 423 transitions, 7012 flow. Second operand 6 states and 150 transitions. [2024-06-03 20:48:38,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 454 transitions, 8266 flow [2024-06-03 20:48:39,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 454 transitions, 7857 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:39,148 INFO L231 Difference]: Finished difference. Result has 314 places, 427 transitions, 6896 flow [2024-06-03 20:48:39,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6605, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6896, PETRI_PLACES=314, PETRI_TRANSITIONS=427} [2024-06-03 20:48:39,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-03 20:48:39,149 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 427 transitions, 6896 flow [2024-06-03 20:48:39,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:39,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:39,149 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 20:48:39,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:48:39,150 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 20:48:39,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:39,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2041080969, now seen corresponding path program 3 times [2024-06-03 20:48:39,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:39,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513806991] [2024-06-03 20:48:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:39,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:39,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:39,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513806991] [2024-06-03 20:48:39,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513806991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:39,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:39,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:39,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637834997] [2024-06-03 20:48:39,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:39,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:39,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:39,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:39,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:39,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 427 transitions, 6896 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:39,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:39,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:39,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:40,223 INFO L124 PetriNetUnfolderBase]: 2406/4056 cut-off events. [2024-06-03 20:48:40,223 INFO L125 PetriNetUnfolderBase]: For 341111/341114 co-relation queries the response was YES. [2024-06-03 20:48:40,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30244 conditions, 4056 events. 2406/4056 cut-off events. For 341111/341114 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25453 event pairs, 324 based on Foata normal form. 14/4068 useless extension candidates. Maximal degree in co-relation 30106. Up to 3008 conditions per place. [2024-06-03 20:48:40,274 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 374 selfloop transitions, 82 changer transitions 0/462 dead transitions. [2024-06-03 20:48:40,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 462 transitions, 8324 flow [2024-06-03 20:48:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 20:48:40,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-03 20:48:40,274 INFO L175 Difference]: Start difference. First operand has 314 places, 427 transitions, 6896 flow. Second operand 7 states and 172 transitions. [2024-06-03 20:48:40,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 462 transitions, 8324 flow [2024-06-03 20:48:41,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 462 transitions, 8207 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-03 20:48:41,362 INFO L231 Difference]: Finished difference. Result has 320 places, 430 transitions, 7045 flow [2024-06-03 20:48:41,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6779, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7045, PETRI_PLACES=320, PETRI_TRANSITIONS=430} [2024-06-03 20:48:41,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-03 20:48:41,363 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 430 transitions, 7045 flow [2024-06-03 20:48:41,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:41,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:41,363 INFO 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 20:48:41,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:48:41,363 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 20:48:41,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1007796255, now seen corresponding path program 1 times [2024-06-03 20:48:41,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:41,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100629625] [2024-06-03 20:48:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:41,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:41,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:41,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100629625] [2024-06-03 20:48:41,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100629625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:41,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:41,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:41,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252264240] [2024-06-03 20:48:41,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:41,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:41,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:41,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:41,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:41,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:41,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 430 transitions, 7045 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:41,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:41,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:41,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:42,459 INFO L124 PetriNetUnfolderBase]: 2454/4141 cut-off events. [2024-06-03 20:48:42,460 INFO L125 PetriNetUnfolderBase]: For 330585/330585 co-relation queries the response was YES. [2024-06-03 20:48:42,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30943 conditions, 4141 events. 2454/4141 cut-off events. For 330585/330585 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 26241 event pairs, 471 based on Foata normal form. 6/4146 useless extension candidates. Maximal degree in co-relation 30802. Up to 3660 conditions per place. [2024-06-03 20:48:42,514 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 401 selfloop transitions, 51 changer transitions 0/458 dead transitions. [2024-06-03 20:48:42,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 458 transitions, 8076 flow [2024-06-03 20:48:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-03 20:48:42,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-03 20:48:42,515 INFO L175 Difference]: Start difference. First operand has 320 places, 430 transitions, 7045 flow. Second operand 9 states and 192 transitions. [2024-06-03 20:48:42,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 458 transitions, 8076 flow [2024-06-03 20:48:43,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 458 transitions, 7859 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:43,920 INFO L231 Difference]: Finished difference. Result has 326 places, 432 transitions, 6986 flow [2024-06-03 20:48:43,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6986, PETRI_PLACES=326, PETRI_TRANSITIONS=432} [2024-06-03 20:48:43,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-03 20:48:43,920 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 432 transitions, 6986 flow [2024-06-03 20:48:43,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:43,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:43,921 INFO 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 20:48:43,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:48:43,921 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 20:48:43,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2032068897, now seen corresponding path program 2 times [2024-06-03 20:48:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:43,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768748717] [2024-06-03 20:48:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:43,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:44,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:44,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768748717] [2024-06-03 20:48:44,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768748717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:44,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:44,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:44,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706185086] [2024-06-03 20:48:44,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:44,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:44,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:44,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:44,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:44,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 432 transitions, 6986 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:44,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:44,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:44,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:45,021 INFO L124 PetriNetUnfolderBase]: 2474/4172 cut-off events. [2024-06-03 20:48:45,021 INFO L125 PetriNetUnfolderBase]: For 339214/339214 co-relation queries the response was YES. [2024-06-03 20:48:45,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30695 conditions, 4172 events. 2474/4172 cut-off events. For 339214/339214 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26475 event pairs, 443 based on Foata normal form. 6/4177 useless extension candidates. Maximal degree in co-relation 30552. Up to 3600 conditions per place. [2024-06-03 20:48:45,074 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 400 selfloop transitions, 55 changer transitions 0/461 dead transitions. [2024-06-03 20:48:45,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 461 transitions, 8024 flow [2024-06-03 20:48:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:45,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:48:45,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:48:45,075 INFO L175 Difference]: Start difference. First operand has 326 places, 432 transitions, 6986 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:48:45,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 461 transitions, 8024 flow [2024-06-03 20:48:46,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 461 transitions, 7919 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:46,305 INFO L231 Difference]: Finished difference. Result has 327 places, 433 transitions, 7021 flow [2024-06-03 20:48:46,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6881, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7021, PETRI_PLACES=327, PETRI_TRANSITIONS=433} [2024-06-03 20:48:46,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-03 20:48:46,306 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 433 transitions, 7021 flow [2024-06-03 20:48:46,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:46,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:46,306 INFO 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 20:48:46,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:48:46,307 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 20:48:46,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:46,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2041265667, now seen corresponding path program 3 times [2024-06-03 20:48:46,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:46,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44480909] [2024-06-03 20:48:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:46,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:46,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:46,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44480909] [2024-06-03 20:48:46,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44480909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:46,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:46,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:46,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026183177] [2024-06-03 20:48:46,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:46,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:46,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:46,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:46,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:46,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:46,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 433 transitions, 7021 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:46,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:46,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:46,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:47,374 INFO L124 PetriNetUnfolderBase]: 2461/4152 cut-off events. [2024-06-03 20:48:47,374 INFO L125 PetriNetUnfolderBase]: For 319963/319966 co-relation queries the response was YES. [2024-06-03 20:48:47,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30107 conditions, 4152 events. 2461/4152 cut-off events. For 319963/319966 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26369 event pairs, 422 based on Foata normal form. 8/4158 useless extension candidates. Maximal degree in co-relation 29963. Up to 3543 conditions per place. [2024-06-03 20:48:47,425 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 398 selfloop transitions, 55 changer transitions 0/459 dead transitions. [2024-06-03 20:48:47,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 459 transitions, 8027 flow [2024-06-03 20:48:47,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-03 20:48:47,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-03 20:48:47,426 INFO L175 Difference]: Start difference. First operand has 327 places, 433 transitions, 7021 flow. Second operand 7 states and 160 transitions. [2024-06-03 20:48:47,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 459 transitions, 8027 flow [2024-06-03 20:48:48,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 459 transitions, 7903 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:48,657 INFO L231 Difference]: Finished difference. Result has 329 places, 433 transitions, 7011 flow [2024-06-03 20:48:48,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6897, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7011, PETRI_PLACES=329, PETRI_TRANSITIONS=433} [2024-06-03 20:48:48,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-03 20:48:48,658 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 433 transitions, 7011 flow [2024-06-03 20:48:48,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:48,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:48,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:48,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:48:48,658 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 20:48:48,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:48,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1153588444, now seen corresponding path program 1 times [2024-06-03 20:48:48,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:48,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428071252] [2024-06-03 20:48:48,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:48,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:48,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:48,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428071252] [2024-06-03 20:48:48,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428071252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:48,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:48,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:48,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534317593] [2024-06-03 20:48:48,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:48,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:48,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:49,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:49,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 433 transitions, 7011 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:49,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:49,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:49,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:49,761 INFO L124 PetriNetUnfolderBase]: 2556/4294 cut-off events. [2024-06-03 20:48:49,761 INFO L125 PetriNetUnfolderBase]: For 367783/367783 co-relation queries the response was YES. [2024-06-03 20:48:49,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31640 conditions, 4294 events. 2556/4294 cut-off events. For 367783/367783 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 27417 event pairs, 484 based on Foata normal form. 10/4296 useless extension candidates. Maximal degree in co-relation 31495. Up to 3390 conditions per place. [2024-06-03 20:48:49,812 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 332 selfloop transitions, 139 changer transitions 0/477 dead transitions. [2024-06-03 20:48:49,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 477 transitions, 8353 flow [2024-06-03 20:48:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:48:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:48:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-03 20:48:49,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:48:49,813 INFO L175 Difference]: Start difference. First operand has 329 places, 433 transitions, 7011 flow. Second operand 12 states and 264 transitions. [2024-06-03 20:48:49,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 477 transitions, 8353 flow [2024-06-03 20:48:51,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 477 transitions, 8200 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:51,160 INFO L231 Difference]: Finished difference. Result has 335 places, 437 transitions, 7249 flow [2024-06-03 20:48:51,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7249, PETRI_PLACES=335, PETRI_TRANSITIONS=437} [2024-06-03 20:48:51,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-03 20:48:51,161 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 437 transitions, 7249 flow [2024-06-03 20:48:51,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:51,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:51,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:51,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:48:51,161 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 20:48:51,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:51,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1150731484, now seen corresponding path program 2 times [2024-06-03 20:48:51,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:51,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907645516] [2024-06-03 20:48:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:51,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:51,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:51,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907645516] [2024-06-03 20:48:51,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907645516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:51,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:51,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:51,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252050475] [2024-06-03 20:48:51,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:51,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:51,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:51,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:51,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:51,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:51,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 437 transitions, 7249 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:51,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:51,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:51,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:52,259 INFO L124 PetriNetUnfolderBase]: 2592/4363 cut-off events. [2024-06-03 20:48:52,260 INFO L125 PetriNetUnfolderBase]: For 377700/377700 co-relation queries the response was YES. [2024-06-03 20:48:52,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32229 conditions, 4363 events. 2592/4363 cut-off events. For 377700/377700 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27941 event pairs, 517 based on Foata normal form. 10/4369 useless extension candidates. Maximal degree in co-relation 32084. Up to 3647 conditions per place. [2024-06-03 20:48:52,312 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 330 selfloop transitions, 135 changer transitions 0/471 dead transitions. [2024-06-03 20:48:52,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 471 transitions, 8331 flow [2024-06-03 20:48:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:48:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:48:52,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-03 20:48:52,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223577235772358 [2024-06-03 20:48:52,313 INFO L175 Difference]: Start difference. First operand has 335 places, 437 transitions, 7249 flow. Second operand 12 states and 257 transitions. [2024-06-03 20:48:52,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 471 transitions, 8331 flow [2024-06-03 20:48:53,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 471 transitions, 8087 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:53,692 INFO L231 Difference]: Finished difference. Result has 340 places, 439 transitions, 7341 flow [2024-06-03 20:48:53,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7025, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7341, PETRI_PLACES=340, PETRI_TRANSITIONS=439} [2024-06-03 20:48:53,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-03 20:48:53,693 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 439 transitions, 7341 flow [2024-06-03 20:48:53,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:53,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:53,693 INFO L208 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 20:48:53,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:48:53,693 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 20:48:53,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:53,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1035440314, now seen corresponding path program 3 times [2024-06-03 20:48:53,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:53,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230548586] [2024-06-03 20:48:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:53,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:54,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:54,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230548586] [2024-06-03 20:48:54,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230548586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:54,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:54,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:54,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615769745] [2024-06-03 20:48:54,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:54,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:54,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:54,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:54,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:54,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:54,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 439 transitions, 7341 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:54,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:54,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:54,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:54,859 INFO L124 PetriNetUnfolderBase]: 2569/4322 cut-off events. [2024-06-03 20:48:54,859 INFO L125 PetriNetUnfolderBase]: For 342702/342705 co-relation queries the response was YES. [2024-06-03 20:48:54,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31349 conditions, 4322 events. 2569/4322 cut-off events. For 342702/342705 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 27688 event pairs, 484 based on Foata normal form. 12/4332 useless extension candidates. Maximal degree in co-relation 31202. Up to 3635 conditions per place. [2024-06-03 20:48:54,912 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 398 selfloop transitions, 65 changer transitions 0/469 dead transitions. [2024-06-03 20:48:54,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 469 transitions, 8361 flow [2024-06-03 20:48:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:48:54,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-03 20:48:54,913 INFO L175 Difference]: Start difference. First operand has 340 places, 439 transitions, 7341 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:48:54,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 469 transitions, 8361 flow [2024-06-03 20:48:56,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 469 transitions, 8049 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:56,521 INFO L231 Difference]: Finished difference. Result has 337 places, 439 transitions, 7173 flow [2024-06-03 20:48:56,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7029, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7173, PETRI_PLACES=337, PETRI_TRANSITIONS=439} [2024-06-03 20:48:56,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-03 20:48:56,522 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 439 transitions, 7173 flow [2024-06-03 20:48:56,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:56,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:56,522 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] [2024-06-03 20:48:56,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:48:56,522 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 20:48:56,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:56,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1326226297, now seen corresponding path program 1 times [2024-06-03 20:48:56,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:56,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428152673] [2024-06-03 20:48:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:56,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:56,795 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 20:48:56,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:56,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428152673] [2024-06-03 20:48:56,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428152673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:56,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:56,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:56,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244065614] [2024-06-03 20:48:56,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:56,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:56,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:56,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:56,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:56,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:56,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 439 transitions, 7173 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:56,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:56,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:56,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:57,679 INFO L124 PetriNetUnfolderBase]: 2590/4365 cut-off events. [2024-06-03 20:48:57,679 INFO L125 PetriNetUnfolderBase]: For 325130/325130 co-relation queries the response was YES. [2024-06-03 20:48:57,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31570 conditions, 4365 events. 2590/4365 cut-off events. For 325130/325130 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 27998 event pairs, 508 based on Foata normal form. 1/4362 useless extension candidates. Maximal degree in co-relation 31422. Up to 3367 conditions per place. [2024-06-03 20:48:57,725 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 280 changer transitions 0/481 dead transitions. [2024-06-03 20:48:57,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 481 transitions, 8648 flow [2024-06-03 20:48:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:48:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:48:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-03 20:48:57,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-03 20:48:57,726 INFO L175 Difference]: Start difference. First operand has 337 places, 439 transitions, 7173 flow. Second operand 12 states and 262 transitions. [2024-06-03 20:48:57,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 481 transitions, 8648 flow [2024-06-03 20:48:59,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 481 transitions, 8510 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:59,327 INFO L231 Difference]: Finished difference. Result has 343 places, 448 transitions, 7714 flow [2024-06-03 20:48:59,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7035, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7714, PETRI_PLACES=343, PETRI_TRANSITIONS=448} [2024-06-03 20:48:59,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-03 20:48:59,328 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 448 transitions, 7714 flow [2024-06-03 20:48:59,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:59,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:59,328 INFO L208 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 20:48:59,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:48:59,328 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 20:48:59,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:59,329 INFO L85 PathProgramCache]: Analyzing trace with hash -377261095, now seen corresponding path program 2 times [2024-06-03 20:48:59,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:59,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60056474] [2024-06-03 20:48:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:59,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:59,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:59,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60056474] [2024-06-03 20:48:59,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60056474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:59,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:59,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:59,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732185340] [2024-06-03 20:48:59,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:59,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:59,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:59,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:59,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:59,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:59,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 448 transitions, 7714 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:59,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:59,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:59,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:00,511 INFO L124 PetriNetUnfolderBase]: 2603/4384 cut-off events. [2024-06-03 20:49:00,512 INFO L125 PetriNetUnfolderBase]: For 337088/337091 co-relation queries the response was YES. [2024-06-03 20:49:00,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32278 conditions, 4384 events. 2603/4384 cut-off events. For 337088/337091 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28134 event pairs, 519 based on Foata normal form. 3/4385 useless extension candidates. Maximal degree in co-relation 32129. Up to 3743 conditions per place. [2024-06-03 20:49:00,573 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 358 selfloop transitions, 120 changer transitions 0/484 dead transitions. [2024-06-03 20:49:00,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 484 transitions, 9154 flow [2024-06-03 20:49:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-03 20:49:00,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-03 20:49:00,574 INFO L175 Difference]: Start difference. First operand has 343 places, 448 transitions, 7714 flow. Second operand 9 states and 206 transitions. [2024-06-03 20:49:00,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 484 transitions, 9154 flow [2024-06-03 20:49:02,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 484 transitions, 8850 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:02,086 INFO L231 Difference]: Finished difference. Result has 346 places, 454 transitions, 7730 flow [2024-06-03 20:49:02,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7424, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7730, PETRI_PLACES=346, PETRI_TRANSITIONS=454} [2024-06-03 20:49:02,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-03 20:49:02,087 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 454 transitions, 7730 flow [2024-06-03 20:49:02,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:02,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:02,087 INFO L208 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 20:49:02,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:49:02,087 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 20:49:02,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash -377266675, now seen corresponding path program 3 times [2024-06-03 20:49:02,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:02,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222525037] [2024-06-03 20:49:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:02,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:02,412 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 20:49:02,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:02,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222525037] [2024-06-03 20:49:02,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222525037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:02,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:02,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:02,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238092445] [2024-06-03 20:49:02,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:02,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:02,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:02,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:02,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:02,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:02,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 454 transitions, 7730 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:02,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:02,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:02,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:03,343 INFO L124 PetriNetUnfolderBase]: 2600/4384 cut-off events. [2024-06-03 20:49:03,343 INFO L125 PetriNetUnfolderBase]: For 339866/339869 co-relation queries the response was YES. [2024-06-03 20:49:03,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32040 conditions, 4384 events. 2600/4384 cut-off events. For 339866/339869 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28138 event pairs, 521 based on Foata normal form. 3/4385 useless extension candidates. Maximal degree in co-relation 31890. Up to 3740 conditions per place. [2024-06-03 20:49:03,398 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 357 selfloop transitions, 118 changer transitions 0/481 dead transitions. [2024-06-03 20:49:03,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 481 transitions, 8918 flow [2024-06-03 20:49:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:49:03,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-03 20:49:03,399 INFO L175 Difference]: Start difference. First operand has 346 places, 454 transitions, 7730 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:49:03,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 481 transitions, 8918 flow [2024-06-03 20:49:05,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 481 transitions, 8665 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:05,074 INFO L231 Difference]: Finished difference. Result has 347 places, 454 transitions, 7720 flow [2024-06-03 20:49:05,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7477, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7720, PETRI_PLACES=347, PETRI_TRANSITIONS=454} [2024-06-03 20:49:05,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-03 20:49:05,075 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 454 transitions, 7720 flow [2024-06-03 20:49:05,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:05,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:05,075 INFO L208 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 20:49:05,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:49:05,075 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 20:49:05,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:05,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1159992517, now seen corresponding path program 4 times [2024-06-03 20:49:05,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:05,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279672707] [2024-06-03 20:49:05,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:05,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:05,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:05,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279672707] [2024-06-03 20:49:05,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279672707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:05,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:05,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:05,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832368773] [2024-06-03 20:49:05,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:05,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:05,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:05,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:05,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:05,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:05,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 454 transitions, 7720 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:05,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:05,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:05,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:06,157 INFO L124 PetriNetUnfolderBase]: 2613/4405 cut-off events. [2024-06-03 20:49:06,157 INFO L125 PetriNetUnfolderBase]: For 351737/351737 co-relation queries the response was YES. [2024-06-03 20:49:06,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32199 conditions, 4405 events. 2613/4405 cut-off events. For 351737/351737 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28326 event pairs, 518 based on Foata normal form. 1/4402 useless extension candidates. Maximal degree in co-relation 32049. Up to 3394 conditions per place. [2024-06-03 20:49:06,219 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 218 selfloop transitions, 267 changer transitions 0/491 dead transitions. [2024-06-03 20:49:06,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 491 transitions, 9372 flow [2024-06-03 20:49:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:49:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:49:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-03 20:49:06,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 20:49:06,220 INFO L175 Difference]: Start difference. First operand has 347 places, 454 transitions, 7720 flow. Second operand 12 states and 258 transitions. [2024-06-03 20:49:06,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 491 transitions, 9372 flow [2024-06-03 20:49:07,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 491 transitions, 9136 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:07,958 INFO L231 Difference]: Finished difference. Result has 353 places, 460 transitions, 8116 flow [2024-06-03 20:49:07,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7484, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8116, PETRI_PLACES=353, PETRI_TRANSITIONS=460} [2024-06-03 20:49:07,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-03 20:49:07,959 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 460 transitions, 8116 flow [2024-06-03 20:49:07,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:07,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:07,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:07,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:49:07,959 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 20:49:07,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:07,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1150726927, now seen corresponding path program 5 times [2024-06-03 20:49:07,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:07,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551436542] [2024-06-03 20:49:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:07,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:08,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:08,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551436542] [2024-06-03 20:49:08,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551436542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:08,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:08,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:08,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479803613] [2024-06-03 20:49:08,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:08,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:08,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:08,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:08,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:08,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:08,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 460 transitions, 8116 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:08,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:08,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:08,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:09,049 INFO L124 PetriNetUnfolderBase]: 2618/4410 cut-off events. [2024-06-03 20:49:09,049 INFO L125 PetriNetUnfolderBase]: For 361281/361281 co-relation queries the response was YES. [2024-06-03 20:49:09,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32719 conditions, 4410 events. 2618/4410 cut-off events. For 361281/361281 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28358 event pairs, 516 based on Foata normal form. 1/4407 useless extension candidates. Maximal degree in co-relation 32568. Up to 3400 conditions per place. [2024-06-03 20:49:09,108 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 251 changer transitions 0/490 dead transitions. [2024-06-03 20:49:09,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 490 transitions, 9722 flow [2024-06-03 20:49:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:09,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-03 20:49:09,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-03 20:49:09,109 INFO L175 Difference]: Start difference. First operand has 353 places, 460 transitions, 8116 flow. Second operand 11 states and 239 transitions. [2024-06-03 20:49:09,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 490 transitions, 9722 flow [2024-06-03 20:49:10,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 490 transitions, 9403 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:10,933 INFO L231 Difference]: Finished difference. Result has 357 places, 463 transitions, 8358 flow [2024-06-03 20:49:10,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8358, PETRI_PLACES=357, PETRI_TRANSITIONS=463} [2024-06-03 20:49:10,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-03 20:49:10,934 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 463 transitions, 8358 flow [2024-06-03 20:49:10,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:10,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:10,934 INFO L208 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 20:49:10,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:49:10,934 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 20:49:10,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1150738087, now seen corresponding path program 6 times [2024-06-03 20:49:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:10,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744854144] [2024-06-03 20:49:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:10,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:11,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:11,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744854144] [2024-06-03 20:49:11,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744854144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:11,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:11,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:11,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137134537] [2024-06-03 20:49:11,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:11,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:11,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:11,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:11,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:11,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:11,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 463 transitions, 8358 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:11,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:11,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:11,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:12,032 INFO L124 PetriNetUnfolderBase]: 2615/4406 cut-off events. [2024-06-03 20:49:12,032 INFO L125 PetriNetUnfolderBase]: For 366790/366790 co-relation queries the response was YES. [2024-06-03 20:49:12,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32765 conditions, 4406 events. 2615/4406 cut-off events. For 366790/366790 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28326 event pairs, 516 based on Foata normal form. 1/4403 useless extension candidates. Maximal degree in co-relation 32613. Up to 3397 conditions per place. [2024-06-03 20:49:12,084 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 234 selfloop transitions, 249 changer transitions 0/489 dead transitions. [2024-06-03 20:49:12,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 489 transitions, 9738 flow [2024-06-03 20:49:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-03 20:49:12,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-03 20:49:12,085 INFO L175 Difference]: Start difference. First operand has 357 places, 463 transitions, 8358 flow. Second operand 11 states and 239 transitions. [2024-06-03 20:49:12,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 489 transitions, 9738 flow [2024-06-03 20:49:14,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 489 transitions, 9426 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:14,022 INFO L231 Difference]: Finished difference. Result has 363 places, 463 transitions, 8550 flow [2024-06-03 20:49:14,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8046, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8550, PETRI_PLACES=363, PETRI_TRANSITIONS=463} [2024-06-03 20:49:14,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-03 20:49:14,023 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 463 transitions, 8550 flow [2024-06-03 20:49:14,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:14,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:14,023 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, 1] [2024-06-03 20:49:14,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:49:14,024 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 20:49:14,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash 395849542, now seen corresponding path program 1 times [2024-06-03 20:49:14,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:14,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696606986] [2024-06-03 20:49:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:14,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696606986] [2024-06-03 20:49:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696606986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:14,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:14,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:14,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019213923] [2024-06-03 20:49:14,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:14,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:14,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:14,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:14,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:14,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 463 transitions, 8550 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:14,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:14,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:14,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:15,142 INFO L124 PetriNetUnfolderBase]: 2651/4465 cut-off events. [2024-06-03 20:49:15,142 INFO L125 PetriNetUnfolderBase]: For 413707/413710 co-relation queries the response was YES. [2024-06-03 20:49:15,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33337 conditions, 4465 events. 2651/4465 cut-off events. For 413707/413710 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28766 event pairs, 525 based on Foata normal form. 12/4475 useless extension candidates. Maximal degree in co-relation 33184. Up to 3804 conditions per place. [2024-06-03 20:49:15,202 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 390 selfloop transitions, 93 changer transitions 0/489 dead transitions. [2024-06-03 20:49:15,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 489 transitions, 9645 flow [2024-06-03 20:49:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:15,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:49:15,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-03 20:49:15,204 INFO L175 Difference]: Start difference. First operand has 363 places, 463 transitions, 8550 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:49:15,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 489 transitions, 9645 flow [2024-06-03 20:49:16,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 489 transitions, 9130 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 20:49:16,880 INFO L231 Difference]: Finished difference. Result has 360 places, 465 transitions, 8282 flow [2024-06-03 20:49:16,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8035, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8282, PETRI_PLACES=360, PETRI_TRANSITIONS=465} [2024-06-03 20:49:16,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-03 20:49:16,880 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 465 transitions, 8282 flow [2024-06-03 20:49:16,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:16,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:16,880 INFO L208 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 20:49:16,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:49:16,880 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 20:49:16,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1035446917, now seen corresponding path program 7 times [2024-06-03 20:49:16,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:16,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069330026] [2024-06-03 20:49:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:16,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:17,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:17,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069330026] [2024-06-03 20:49:17,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069330026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:17,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:17,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:17,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675021095] [2024-06-03 20:49:17,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:17,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:17,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:17,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:17,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:17,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 465 transitions, 8282 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:17,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:17,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:17,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:17,940 INFO L124 PetriNetUnfolderBase]: 2656/4476 cut-off events. [2024-06-03 20:49:17,940 INFO L125 PetriNetUnfolderBase]: For 383460/383463 co-relation queries the response was YES. [2024-06-03 20:49:17,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33135 conditions, 4476 events. 2656/4476 cut-off events. For 383460/383463 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 28824 event pairs, 527 based on Foata normal form. 3/4477 useless extension candidates. Maximal degree in co-relation 32981. Up to 3644 conditions per place. [2024-06-03 20:49:17,995 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 313 selfloop transitions, 174 changer transitions 0/493 dead transitions. [2024-06-03 20:49:17,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 493 transitions, 9714 flow [2024-06-03 20:49:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:49:17,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:49:17,997 INFO L175 Difference]: Start difference. First operand has 360 places, 465 transitions, 8282 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:49:17,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 493 transitions, 9714 flow [2024-06-03 20:49:20,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 493 transitions, 9504 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:20,089 INFO L231 Difference]: Finished difference. Result has 362 places, 468 transitions, 8463 flow [2024-06-03 20:49:20,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8072, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8463, PETRI_PLACES=362, PETRI_TRANSITIONS=468} [2024-06-03 20:49:20,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-03 20:49:20,089 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 468 transitions, 8463 flow [2024-06-03 20:49:20,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:20,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:20,090 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] [2024-06-03 20:49:20,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:49:20,090 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 20:49:20,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:20,090 INFO L85 PathProgramCache]: Analyzing trace with hash -90195205, now seen corresponding path program 8 times [2024-06-03 20:49:20,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:20,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280868372] [2024-06-03 20:49:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:20,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:20,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:20,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280868372] [2024-06-03 20:49:20,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280868372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:20,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:20,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:20,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667149572] [2024-06-03 20:49:20,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:20,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:20,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:20,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:20,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:20,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:20,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 468 transitions, 8463 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:20,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:20,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:20,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:21,197 INFO L124 PetriNetUnfolderBase]: 2661/4485 cut-off events. [2024-06-03 20:49:21,197 INFO L125 PetriNetUnfolderBase]: For 392151/392154 co-relation queries the response was YES. [2024-06-03 20:49:21,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33355 conditions, 4485 events. 2661/4485 cut-off events. For 392151/392154 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28924 event pairs, 527 based on Foata normal form. 3/4486 useless extension candidates. Maximal degree in co-relation 33200. Up to 3650 conditions per place. [2024-06-03 20:49:21,256 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 320 selfloop transitions, 166 changer transitions 0/492 dead transitions. [2024-06-03 20:49:21,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 492 transitions, 9711 flow [2024-06-03 20:49:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:49:21,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:49:21,258 INFO L175 Difference]: Start difference. First operand has 362 places, 468 transitions, 8463 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:49:21,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 492 transitions, 9711 flow [2024-06-03 20:49:23,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 492 transitions, 9395 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:23,256 INFO L231 Difference]: Finished difference. Result has 365 places, 471 transitions, 8530 flow [2024-06-03 20:49:23,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8150, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8530, PETRI_PLACES=365, PETRI_TRANSITIONS=471} [2024-06-03 20:49:23,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-03 20:49:23,256 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 471 transitions, 8530 flow [2024-06-03 20:49:23,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:23,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:23,257 INFO L208 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 20:49:23,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:49:23,257 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 20:49:23,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1035268357, now seen corresponding path program 9 times [2024-06-03 20:49:23,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:23,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393734601] [2024-06-03 20:49:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:23,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:23,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:23,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393734601] [2024-06-03 20:49:23,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393734601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:23,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:23,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746411570] [2024-06-03 20:49:23,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:23,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:23,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:23,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:23,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:23,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:23,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 471 transitions, 8530 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:23,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:23,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:23,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:24,398 INFO L124 PetriNetUnfolderBase]: 2658/4481 cut-off events. [2024-06-03 20:49:24,398 INFO L125 PetriNetUnfolderBase]: For 395783/395786 co-relation queries the response was YES. [2024-06-03 20:49:24,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33362 conditions, 4481 events. 2658/4481 cut-off events. For 395783/395786 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28952 event pairs, 527 based on Foata normal form. 3/4482 useless extension candidates. Maximal degree in co-relation 33206. Up to 3647 conditions per place. [2024-06-03 20:49:24,456 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 304 selfloop transitions, 186 changer transitions 0/496 dead transitions. [2024-06-03 20:49:24,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 496 transitions, 9938 flow [2024-06-03 20:49:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-03 20:49:24,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-03 20:49:24,457 INFO L175 Difference]: Start difference. First operand has 365 places, 471 transitions, 8530 flow. Second operand 10 states and 218 transitions. [2024-06-03 20:49:24,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 496 transitions, 9938 flow [2024-06-03 20:49:26,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 496 transitions, 9702 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:26,664 INFO L231 Difference]: Finished difference. Result has 371 places, 471 transitions, 8672 flow [2024-06-03 20:49:26,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8294, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8672, PETRI_PLACES=371, PETRI_TRANSITIONS=471} [2024-06-03 20:49:26,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-03 20:49:26,665 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 471 transitions, 8672 flow [2024-06-03 20:49:26,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:26,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:26,665 INFO L208 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 20:49:26,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:49:26,665 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 20:49:26,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:26,666 INFO L85 PathProgramCache]: Analyzing trace with hash -90022225, now seen corresponding path program 10 times [2024-06-03 20:49:26,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:26,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301259347] [2024-06-03 20:49:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:26,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:26,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:26,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301259347] [2024-06-03 20:49:26,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301259347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:26,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:26,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949986133] [2024-06-03 20:49:26,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:26,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:26,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:26,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:26,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 471 transitions, 8672 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:26,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:26,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:26,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:27,754 INFO L124 PetriNetUnfolderBase]: 2655/4477 cut-off events. [2024-06-03 20:49:27,754 INFO L125 PetriNetUnfolderBase]: For 400340/400343 co-relation queries the response was YES. [2024-06-03 20:49:27,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33469 conditions, 4477 events. 2655/4477 cut-off events. For 400340/400343 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28873 event pairs, 527 based on Foata normal form. 3/4478 useless extension candidates. Maximal degree in co-relation 33312. Up to 3644 conditions per place. [2024-06-03 20:49:27,809 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 313 selfloop transitions, 175 changer transitions 0/494 dead transitions. [2024-06-03 20:49:27,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 494 transitions, 9890 flow [2024-06-03 20:49:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-03 20:49:27,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-03 20:49:27,810 INFO L175 Difference]: Start difference. First operand has 371 places, 471 transitions, 8672 flow. Second operand 9 states and 200 transitions. [2024-06-03 20:49:27,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 494 transitions, 9890 flow [2024-06-03 20:49:30,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 494 transitions, 9472 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:30,009 INFO L231 Difference]: Finished difference. Result has 372 places, 471 transitions, 8614 flow [2024-06-03 20:49:30,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8254, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8614, PETRI_PLACES=372, PETRI_TRANSITIONS=471} [2024-06-03 20:49:30,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-03 20:49:30,010 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 471 transitions, 8614 flow [2024-06-03 20:49:30,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:30,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:30,010 INFO L208 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 20:49:30,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:49:30,010 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 20:49:30,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1429140824, now seen corresponding path program 2 times [2024-06-03 20:49:30,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:30,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372294945] [2024-06-03 20:49:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:30,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:30,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:30,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372294945] [2024-06-03 20:49:30,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372294945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:30,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:30,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:30,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723081127] [2024-06-03 20:49:30,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:30,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:30,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:30,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:30,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:30,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 471 transitions, 8614 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:30,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:30,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:30,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:31,166 INFO L124 PetriNetUnfolderBase]: 2691/4533 cut-off events. [2024-06-03 20:49:31,167 INFO L125 PetriNetUnfolderBase]: For 447648/447651 co-relation queries the response was YES. [2024-06-03 20:49:31,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33916 conditions, 4533 events. 2691/4533 cut-off events. For 447648/447651 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 29265 event pairs, 543 based on Foata normal form. 12/4543 useless extension candidates. Maximal degree in co-relation 33758. Up to 3872 conditions per place. [2024-06-03 20:49:31,226 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 404 selfloop transitions, 84 changer transitions 0/494 dead transitions. [2024-06-03 20:49:31,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 494 transitions, 9715 flow [2024-06-03 20:49:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:49:31,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:49:31,227 INFO L175 Difference]: Start difference. First operand has 372 places, 471 transitions, 8614 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:49:31,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 494 transitions, 9715 flow [2024-06-03 20:49:33,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 494 transitions, 9263 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:33,650 INFO L231 Difference]: Finished difference. Result has 370 places, 473 transitions, 8393 flow [2024-06-03 20:49:33,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8162, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8393, PETRI_PLACES=370, PETRI_TRANSITIONS=473} [2024-06-03 20:49:33,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-03 20:49:33,651 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 473 transitions, 8393 flow [2024-06-03 20:49:33,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:33,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:33,651 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 20:49:33,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:49:33,651 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 20:49:33,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:33,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1428844154, now seen corresponding path program 3 times [2024-06-03 20:49:33,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:33,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869608708] [2024-06-03 20:49:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:33,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:33,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:33,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869608708] [2024-06-03 20:49:33,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869608708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:33,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:33,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:33,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443782135] [2024-06-03 20:49:33,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:33,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:33,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:33,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:34,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:34,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 473 transitions, 8393 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:34,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:34,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:34,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:34,770 INFO L124 PetriNetUnfolderBase]: 2681/4517 cut-off events. [2024-06-03 20:49:34,770 INFO L125 PetriNetUnfolderBase]: For 417003/417006 co-relation queries the response was YES. [2024-06-03 20:49:34,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32949 conditions, 4517 events. 2681/4517 cut-off events. For 417003/417006 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 29101 event pairs, 517 based on Foata normal form. 12/4527 useless extension candidates. Maximal degree in co-relation 32790. Up to 3520 conditions per place. [2024-06-03 20:49:34,835 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 405 selfloop transitions, 90 changer transitions 0/501 dead transitions. [2024-06-03 20:49:34,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 501 transitions, 9734 flow [2024-06-03 20:49:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:49:34,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-03 20:49:34,836 INFO L175 Difference]: Start difference. First operand has 370 places, 473 transitions, 8393 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:49:34,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 501 transitions, 9734 flow [2024-06-03 20:49:37,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 501 transitions, 9536 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:37,195 INFO L231 Difference]: Finished difference. Result has 372 places, 475 transitions, 8442 flow [2024-06-03 20:49:37,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8195, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8442, PETRI_PLACES=372, PETRI_TRANSITIONS=475} [2024-06-03 20:49:37,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-03 20:49:37,195 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 475 transitions, 8442 flow [2024-06-03 20:49:37,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:37,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:37,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:37,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:49:37,197 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 20:49:37,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash -284529110, now seen corresponding path program 4 times [2024-06-03 20:49:37,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:37,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846019895] [2024-06-03 20:49:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:37,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:37,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:37,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846019895] [2024-06-03 20:49:37,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846019895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:37,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:37,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:37,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503679371] [2024-06-03 20:49:37,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:37,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:37,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:37,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:37,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:37,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:37,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 475 transitions, 8442 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:37,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:37,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:37,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:38,452 INFO L124 PetriNetUnfolderBase]: 2702/4534 cut-off events. [2024-06-03 20:49:38,452 INFO L125 PetriNetUnfolderBase]: For 402154/402154 co-relation queries the response was YES. [2024-06-03 20:49:38,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33538 conditions, 4534 events. 2702/4534 cut-off events. For 402154/402154 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29156 event pairs, 550 based on Foata normal form. 2/4529 useless extension candidates. Maximal degree in co-relation 33378. Up to 3929 conditions per place. [2024-06-03 20:49:38,508 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 421 selfloop transitions, 89 changer transitions 0/516 dead transitions. [2024-06-03 20:49:38,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 516 transitions, 9976 flow [2024-06-03 20:49:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:49:38,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-03 20:49:38,509 INFO L175 Difference]: Start difference. First operand has 372 places, 475 transitions, 8442 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:49:38,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 516 transitions, 9976 flow [2024-06-03 20:49:40,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 516 transitions, 9784 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:40,564 INFO L231 Difference]: Finished difference. Result has 382 places, 486 transitions, 8758 flow [2024-06-03 20:49:40,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8254, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8758, PETRI_PLACES=382, PETRI_TRANSITIONS=486} [2024-06-03 20:49:40,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-03 20:49:40,565 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 486 transitions, 8758 flow [2024-06-03 20:49:40,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:40,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:40,565 INFO L208 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 20:49:40,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:49:40,565 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 20:49:40,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1947498328, now seen corresponding path program 5 times [2024-06-03 20:49:40,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:40,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321027112] [2024-06-03 20:49:40,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:40,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:40,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:40,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321027112] [2024-06-03 20:49:40,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321027112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:40,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:40,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:40,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559496501] [2024-06-03 20:49:40,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:40,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:40,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:40,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:40,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:40,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:40,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 486 transitions, 8758 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:40,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:40,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:40,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:41,794 INFO L124 PetriNetUnfolderBase]: 2710/4551 cut-off events. [2024-06-03 20:49:41,794 INFO L125 PetriNetUnfolderBase]: For 410374/410374 co-relation queries the response was YES. [2024-06-03 20:49:41,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33766 conditions, 4551 events. 2710/4551 cut-off events. For 410374/410374 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29363 event pairs, 557 based on Foata normal form. 2/4546 useless extension candidates. Maximal degree in co-relation 33602. Up to 3857 conditions per place. [2024-06-03 20:49:41,861 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 348 selfloop transitions, 160 changer transitions 0/514 dead transitions. [2024-06-03 20:49:41,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 514 transitions, 9894 flow [2024-06-03 20:49:41,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:49:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:49:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-03 20:49:41,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:49:41,862 INFO L175 Difference]: Start difference. First operand has 382 places, 486 transitions, 8758 flow. Second operand 12 states and 252 transitions. [2024-06-03 20:49:41,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 514 transitions, 9894 flow [2024-06-03 20:49:44,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 514 transitions, 9737 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:44,027 INFO L231 Difference]: Finished difference. Result has 390 places, 488 transitions, 8988 flow [2024-06-03 20:49:44,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8627, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8988, PETRI_PLACES=390, PETRI_TRANSITIONS=488} [2024-06-03 20:49:44,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-03 20:49:44,027 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 488 transitions, 8988 flow [2024-06-03 20:49:44,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:44,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:44,028 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] [2024-06-03 20:49:44,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:49:44,028 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 20:49:44,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:44,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1125451329, now seen corresponding path program 11 times [2024-06-03 20:49:44,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:44,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394611659] [2024-06-03 20:49:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:44,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:44,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:44,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394611659] [2024-06-03 20:49:44,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394611659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:44,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:44,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:44,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857830226] [2024-06-03 20:49:44,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:44,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:44,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:44,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:44,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:44,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:44,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 488 transitions, 8988 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:44,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:44,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:44,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:45,209 INFO L124 PetriNetUnfolderBase]: 2715/4569 cut-off events. [2024-06-03 20:49:45,209 INFO L125 PetriNetUnfolderBase]: For 413312/413315 co-relation queries the response was YES. [2024-06-03 20:49:45,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34077 conditions, 4569 events. 2715/4569 cut-off events. For 413312/413315 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29558 event pairs, 559 based on Foata normal form. 3/4564 useless extension candidates. Maximal degree in co-relation 33911. Up to 4032 conditions per place. [2024-06-03 20:49:45,274 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 467 selfloop transitions, 39 changer transitions 0/512 dead transitions. [2024-06-03 20:49:45,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 512 transitions, 10104 flow [2024-06-03 20:49:45,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-03 20:49:45,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-03 20:49:45,275 INFO L175 Difference]: Start difference. First operand has 390 places, 488 transitions, 8988 flow. Second operand 8 states and 173 transitions. [2024-06-03 20:49:45,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 512 transitions, 10104 flow [2024-06-03 20:49:47,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 512 transitions, 9767 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:47,519 INFO L231 Difference]: Finished difference. Result has 389 places, 491 transitions, 8793 flow [2024-06-03 20:49:47,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8651, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8793, PETRI_PLACES=389, PETRI_TRANSITIONS=491} [2024-06-03 20:49:47,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-03 20:49:47,520 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 491 transitions, 8793 flow [2024-06-03 20:49:47,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:47,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:47,520 INFO L208 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 20:49:47,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:49:47,520 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 20:49:47,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:47,521 INFO L85 PathProgramCache]: Analyzing trace with hash -281667593, now seen corresponding path program 12 times [2024-06-03 20:49:47,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:47,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047863194] [2024-06-03 20:49:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:47,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:47,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:47,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047863194] [2024-06-03 20:49:47,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047863194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:47,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:47,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:47,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797812206] [2024-06-03 20:49:47,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:47,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:47,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:47,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:47,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:47,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:47,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 491 transitions, 8793 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:47,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:47,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:47,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:48,696 INFO L124 PetriNetUnfolderBase]: 2728/4591 cut-off events. [2024-06-03 20:49:48,696 INFO L125 PetriNetUnfolderBase]: For 425235/425238 co-relation queries the response was YES. [2024-06-03 20:49:48,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34067 conditions, 4591 events. 2728/4591 cut-off events. For 425235/425238 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29705 event pairs, 559 based on Foata normal form. 3/4586 useless extension candidates. Maximal degree in co-relation 33900. Up to 3565 conditions per place. [2024-06-03 20:49:48,755 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 260 changer transitions 0/521 dead transitions. [2024-06-03 20:49:48,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 521 transitions, 10589 flow [2024-06-03 20:49:48,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:49:48,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-03 20:49:48,756 INFO L175 Difference]: Start difference. First operand has 389 places, 491 transitions, 8793 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:49:48,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 521 transitions, 10589 flow [2024-06-03 20:49:50,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 521 transitions, 10487 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:50,989 INFO L231 Difference]: Finished difference. Result has 394 places, 497 transitions, 9333 flow [2024-06-03 20:49:50,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8691, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9333, PETRI_PLACES=394, PETRI_TRANSITIONS=497} [2024-06-03 20:49:50,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-03 20:49:50,990 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 497 transitions, 9333 flow [2024-06-03 20:49:50,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:50,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:50,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:50,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:49:50,990 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 20:49:50,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:50,991 INFO L85 PathProgramCache]: Analyzing trace with hash -281678753, now seen corresponding path program 13 times [2024-06-03 20:49:50,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:50,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993261182] [2024-06-03 20:49:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:50,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:51,272 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 20:49:51,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:51,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993261182] [2024-06-03 20:49:51,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993261182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:51,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:51,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:51,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005293025] [2024-06-03 20:49:51,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:51,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:51,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:51,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:51,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:51,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:51,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 497 transitions, 9333 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:51,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:51,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:51,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:52,172 INFO L124 PetriNetUnfolderBase]: 2725/4587 cut-off events. [2024-06-03 20:49:52,172 INFO L125 PetriNetUnfolderBase]: For 430829/430832 co-relation queries the response was YES. [2024-06-03 20:49:52,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34524 conditions, 4587 events. 2725/4587 cut-off events. For 430829/430832 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 29669 event pairs, 559 based on Foata normal form. 3/4582 useless extension candidates. Maximal degree in co-relation 34356. Up to 3562 conditions per place. [2024-06-03 20:49:52,238 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 259 changer transitions 0/520 dead transitions. [2024-06-03 20:49:52,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 520 transitions, 10815 flow [2024-06-03 20:49:52,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:49:52,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-03 20:49:52,239 INFO L175 Difference]: Start difference. First operand has 394 places, 497 transitions, 9333 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:49:52,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 520 transitions, 10815 flow [2024-06-03 20:49:54,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 520 transitions, 10202 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:54,498 INFO L231 Difference]: Finished difference. Result has 398 places, 497 transitions, 9244 flow [2024-06-03 20:49:54,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8720, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9244, PETRI_PLACES=398, PETRI_TRANSITIONS=497} [2024-06-03 20:49:54,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-03 20:49:54,498 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 497 transitions, 9244 flow [2024-06-03 20:49:54,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:54,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:54,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:54,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:49:54,499 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 20:49:54,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash -637848022, now seen corresponding path program 6 times [2024-06-03 20:49:54,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:54,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472375993] [2024-06-03 20:49:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:54,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:54,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:54,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472375993] [2024-06-03 20:49:54,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472375993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:54,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:54,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:54,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124301004] [2024-06-03 20:49:54,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:54,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:54,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:54,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:54,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:54,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:54,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 497 transitions, 9244 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:54,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:54,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:54,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:55,706 INFO L124 PetriNetUnfolderBase]: 2803/4694 cut-off events. [2024-06-03 20:49:55,706 INFO L125 PetriNetUnfolderBase]: For 466504/466504 co-relation queries the response was YES. [2024-06-03 20:49:55,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35444 conditions, 4694 events. 2803/4694 cut-off events. For 466504/466504 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 30360 event pairs, 478 based on Foata normal form. 2/4689 useless extension candidates. Maximal degree in co-relation 35276. Up to 3715 conditions per place. [2024-06-03 20:49:55,772 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 429 selfloop transitions, 107 changer transitions 0/542 dead transitions. [2024-06-03 20:49:55,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 542 transitions, 11048 flow [2024-06-03 20:49:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 20:49:55,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:49:55,773 INFO L175 Difference]: Start difference. First operand has 398 places, 497 transitions, 9244 flow. Second operand 10 states and 225 transitions. [2024-06-03 20:49:55,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 542 transitions, 11048 flow [2024-06-03 20:49:58,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 542 transitions, 10556 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:58,017 INFO L231 Difference]: Finished difference. Result has 400 places, 508 transitions, 9251 flow [2024-06-03 20:49:58,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8752, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9251, PETRI_PLACES=400, PETRI_TRANSITIONS=508} [2024-06-03 20:49:58,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-03 20:49:58,018 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 508 transitions, 9251 flow [2024-06-03 20:49:58,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:58,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:58,018 INFO L208 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 20:49:58,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:49:58,018 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 20:49:58,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:58,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1678513258, now seen corresponding path program 7 times [2024-06-03 20:49:58,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:58,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989830971] [2024-06-03 20:49:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:58,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:58,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:58,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989830971] [2024-06-03 20:49:58,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989830971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:58,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:58,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:58,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981542237] [2024-06-03 20:49:58,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:58,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:58,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:58,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:58,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:58,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:58,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 508 transitions, 9251 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:58,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:58,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:58,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:59,387 INFO L124 PetriNetUnfolderBase]: 2824/4727 cut-off events. [2024-06-03 20:49:59,387 INFO L125 PetriNetUnfolderBase]: For 484605/484605 co-relation queries the response was YES. [2024-06-03 20:49:59,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36218 conditions, 4727 events. 2824/4727 cut-off events. For 484605/484605 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 30593 event pairs, 462 based on Foata normal form. 2/4722 useless extension candidates. Maximal degree in co-relation 36048. Up to 3553 conditions per place. [2024-06-03 20:49:59,447 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 354 selfloop transitions, 190 changer transitions 0/550 dead transitions. [2024-06-03 20:49:59,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 550 transitions, 11073 flow [2024-06-03 20:49:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-03 20:49:59,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-03 20:49:59,448 INFO L175 Difference]: Start difference. First operand has 400 places, 508 transitions, 9251 flow. Second operand 11 states and 246 transitions. [2024-06-03 20:49:59,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 550 transitions, 11073 flow [2024-06-03 20:50:01,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 550 transitions, 10807 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:01,858 INFO L231 Difference]: Finished difference. Result has 407 places, 514 transitions, 9613 flow [2024-06-03 20:50:01,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9039, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9613, PETRI_PLACES=407, PETRI_TRANSITIONS=514} [2024-06-03 20:50:01,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-03 20:50:01,858 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 514 transitions, 9613 flow [2024-06-03 20:50:01,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:01,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:01,859 INFO L208 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 20:50:01,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:50:01,859 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 20:50:01,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:01,859 INFO L85 PathProgramCache]: Analyzing trace with hash 53321560, now seen corresponding path program 8 times [2024-06-03 20:50:01,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:01,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957405897] [2024-06-03 20:50:01,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:01,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:02,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:02,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957405897] [2024-06-03 20:50:02,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957405897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:02,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:02,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:02,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767483547] [2024-06-03 20:50:02,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:02,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:02,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:02,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:02,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:02,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:02,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 514 transitions, 9613 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:02,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:02,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:02,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:03,136 INFO L124 PetriNetUnfolderBase]: 2858/4775 cut-off events. [2024-06-03 20:50:03,136 INFO L125 PetriNetUnfolderBase]: For 513424/513424 co-relation queries the response was YES. [2024-06-03 20:50:03,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37625 conditions, 4775 events. 2858/4775 cut-off events. For 513424/513424 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 30903 event pairs, 570 based on Foata normal form. 2/4768 useless extension candidates. Maximal degree in co-relation 37452. Up to 4007 conditions per place. [2024-06-03 20:50:03,206 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 165 changer transitions 0/547 dead transitions. [2024-06-03 20:50:03,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 547 transitions, 11121 flow [2024-06-03 20:50:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:50:03,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:50:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-03 20:50:03,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-03 20:50:03,206 INFO L175 Difference]: Start difference. First operand has 407 places, 514 transitions, 9613 flow. Second operand 11 states and 239 transitions. [2024-06-03 20:50:03,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 547 transitions, 11121 flow [2024-06-03 20:50:05,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 547 transitions, 10759 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:05,418 INFO L231 Difference]: Finished difference. Result has 412 places, 520 transitions, 9751 flow [2024-06-03 20:50:05,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9257, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9751, PETRI_PLACES=412, PETRI_TRANSITIONS=520} [2024-06-03 20:50:05,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-03 20:50:05,419 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 520 transitions, 9751 flow [2024-06-03 20:50:05,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:05,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:05,419 INFO L208 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 20:50:05,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:50:05,420 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 20:50:05,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:05,420 INFO L85 PathProgramCache]: Analyzing trace with hash 44750680, now seen corresponding path program 9 times [2024-06-03 20:50:05,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:05,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441674020] [2024-06-03 20:50:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:05,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:05,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:05,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441674020] [2024-06-03 20:50:05,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441674020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:05,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:05,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:05,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102391910] [2024-06-03 20:50:05,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:05,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:05,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:05,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:05,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:05,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 520 transitions, 9751 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:05,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:05,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:05,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:06,689 INFO L124 PetriNetUnfolderBase]: 2853/4770 cut-off events. [2024-06-03 20:50:06,689 INFO L125 PetriNetUnfolderBase]: For 512157/512157 co-relation queries the response was YES. [2024-06-03 20:50:06,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37319 conditions, 4770 events. 2853/4770 cut-off events. For 512157/512157 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 30889 event pairs, 573 based on Foata normal form. 2/4765 useless extension candidates. Maximal degree in co-relation 37144. Up to 4070 conditions per place. [2024-06-03 20:50:06,762 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 379 selfloop transitions, 157 changer transitions 0/542 dead transitions. [2024-06-03 20:50:06,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 542 transitions, 10875 flow [2024-06-03 20:50:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:50:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:50:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-03 20:50:06,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-06-03 20:50:06,763 INFO L175 Difference]: Start difference. First operand has 412 places, 520 transitions, 9751 flow. Second operand 11 states and 234 transitions. [2024-06-03 20:50:06,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 542 transitions, 10875 flow [2024-06-03 20:50:09,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 542 transitions, 10539 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:09,582 INFO L231 Difference]: Finished difference. Result has 415 places, 520 transitions, 9734 flow [2024-06-03 20:50:09,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9415, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9734, PETRI_PLACES=415, PETRI_TRANSITIONS=520} [2024-06-03 20:50:09,582 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-03 20:50:09,583 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 520 transitions, 9734 flow [2024-06-03 20:50:09,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:09,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:09,583 INFO L208 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 20:50:09,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:50:09,583 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 20:50:09,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:09,583 INFO L85 PathProgramCache]: Analyzing trace with hash 120507039, now seen corresponding path program 14 times [2024-06-03 20:50:09,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:09,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228184113] [2024-06-03 20:50:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:09,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:09,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:09,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228184113] [2024-06-03 20:50:09,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228184113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:09,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:09,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:09,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160740535] [2024-06-03 20:50:09,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:09,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:09,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:09,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:09,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:09,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:09,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 520 transitions, 9734 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:09,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:09,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:09,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:10,848 INFO L124 PetriNetUnfolderBase]: 2866/4801 cut-off events. [2024-06-03 20:50:10,848 INFO L125 PetriNetUnfolderBase]: For 522523/522526 co-relation queries the response was YES. [2024-06-03 20:50:10,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37548 conditions, 4801 events. 2866/4801 cut-off events. For 522523/522526 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31194 event pairs, 575 based on Foata normal form. 3/4796 useless extension candidates. Maximal degree in co-relation 37372. Up to 3769 conditions per place. [2024-06-03 20:50:10,923 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 258 changer transitions 0/545 dead transitions. [2024-06-03 20:50:10,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 545 transitions, 11380 flow [2024-06-03 20:50:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-03 20:50:10,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 20:50:10,924 INFO L175 Difference]: Start difference. First operand has 415 places, 520 transitions, 9734 flow. Second operand 10 states and 215 transitions. [2024-06-03 20:50:10,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 545 transitions, 11380 flow [2024-06-03 20:50:13,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 545 transitions, 11041 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-03 20:50:13,849 INFO L231 Difference]: Finished difference. Result has 416 places, 526 transitions, 10021 flow [2024-06-03 20:50:13,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9395, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10021, PETRI_PLACES=416, PETRI_TRANSITIONS=526} [2024-06-03 20:50:13,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-03 20:50:13,849 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 526 transitions, 10021 flow [2024-06-03 20:50:13,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:13,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:13,850 INFO L208 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 20:50:13,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:50:13,850 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 20:50:13,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:13,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2110926845, now seen corresponding path program 15 times [2024-06-03 20:50:13,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:13,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266112633] [2024-06-03 20:50:13,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:13,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:14,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:14,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266112633] [2024-06-03 20:50:14,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266112633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:14,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:14,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:14,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333303426] [2024-06-03 20:50:14,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:14,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:14,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:14,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:14,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:14,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:14,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 526 transitions, 10021 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:14,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:14,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:14,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:15,100 INFO L124 PetriNetUnfolderBase]: 2871/4808 cut-off events. [2024-06-03 20:50:15,100 INFO L125 PetriNetUnfolderBase]: For 532958/532961 co-relation queries the response was YES. [2024-06-03 20:50:15,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37866 conditions, 4808 events. 2871/4808 cut-off events. For 532958/532961 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31185 event pairs, 545 based on Foata normal form. 3/4809 useless extension candidates. Maximal degree in co-relation 37689. Up to 4354 conditions per place. [2024-06-03 20:50:15,169 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 484 selfloop transitions, 56 changer transitions 0/546 dead transitions. [2024-06-03 20:50:15,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 546 transitions, 11199 flow [2024-06-03 20:50:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-03 20:50:15,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-03 20:50:15,170 INFO L175 Difference]: Start difference. First operand has 416 places, 526 transitions, 10021 flow. Second operand 10 states and 200 transitions. [2024-06-03 20:50:15,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 546 transitions, 11199 flow [2024-06-03 20:50:18,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 546 transitions, 10792 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:18,439 INFO L231 Difference]: Finished difference. Result has 420 places, 529 transitions, 9796 flow [2024-06-03 20:50:18,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9623, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9796, PETRI_PLACES=420, PETRI_TRANSITIONS=529} [2024-06-03 20:50:18,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-03 20:50:18,440 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 529 transitions, 9796 flow [2024-06-03 20:50:18,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:18,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:18,440 INFO L208 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 20:50:18,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:50:18,440 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 20:50:18,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:18,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2110552055, now seen corresponding path program 16 times [2024-06-03 20:50:18,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:18,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56421402] [2024-06-03 20:50:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:18,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:18,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:18,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56421402] [2024-06-03 20:50:18,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56421402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:18,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:18,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:18,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089290915] [2024-06-03 20:50:18,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:18,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:18,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:18,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:18,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:18,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:18,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 529 transitions, 9796 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:18,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:18,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:18,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:19,698 INFO L124 PetriNetUnfolderBase]: 2868/4806 cut-off events. [2024-06-03 20:50:19,698 INFO L125 PetriNetUnfolderBase]: For 534832/534835 co-relation queries the response was YES. [2024-06-03 20:50:19,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37317 conditions, 4806 events. 2868/4806 cut-off events. For 534832/534835 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31223 event pairs, 575 based on Foata normal form. 3/4801 useless extension candidates. Maximal degree in co-relation 37139. Up to 3772 conditions per place. [2024-06-03 20:50:19,772 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 260 changer transitions 0/547 dead transitions. [2024-06-03 20:50:19,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 547 transitions, 11134 flow [2024-06-03 20:50:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:19,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-03 20:50:19,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 20:50:19,773 INFO L175 Difference]: Start difference. First operand has 420 places, 529 transitions, 9796 flow. Second operand 10 states and 215 transitions. [2024-06-03 20:50:19,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 547 transitions, 11134 flow [2024-06-03 20:50:23,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 547 transitions, 11002 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:23,542 INFO L231 Difference]: Finished difference. Result has 423 places, 529 transitions, 10190 flow [2024-06-03 20:50:23,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9664, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10190, PETRI_PLACES=423, PETRI_TRANSITIONS=529} [2024-06-03 20:50:23,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-03 20:50:23,543 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 529 transitions, 10190 flow [2024-06-03 20:50:23,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:23,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:23,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:23,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:50:23,543 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 20:50:23,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:23,543 INFO L85 PathProgramCache]: Analyzing trace with hash 236687520, now seen corresponding path program 10 times [2024-06-03 20:50:23,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:23,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233535672] [2024-06-03 20:50:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:23,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:23,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:23,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233535672] [2024-06-03 20:50:23,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233535672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:23,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:23,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:23,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746889754] [2024-06-03 20:50:23,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:23,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:23,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:23,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:23,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 529 transitions, 10190 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:23,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:23,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:23,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:24,832 INFO L124 PetriNetUnfolderBase]: 2863/4786 cut-off events. [2024-06-03 20:50:24,832 INFO L125 PetriNetUnfolderBase]: For 541080/541080 co-relation queries the response was YES. [2024-06-03 20:50:24,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37650 conditions, 4786 events. 2863/4786 cut-off events. For 541080/541080 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31033 event pairs, 568 based on Foata normal form. 2/4781 useless extension candidates. Maximal degree in co-relation 37471. Up to 4161 conditions per place. [2024-06-03 20:50:24,905 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 467 selfloop transitions, 89 changer transitions 0/562 dead transitions. [2024-06-03 20:50:24,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 562 transitions, 11644 flow [2024-06-03 20:50:24,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:50:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:50:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:50:24,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-03 20:50:24,905 INFO L175 Difference]: Start difference. First operand has 423 places, 529 transitions, 10190 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:50:24,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 562 transitions, 11644 flow [2024-06-03 20:50:27,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 562 transitions, 11076 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-03 20:50:27,864 INFO L231 Difference]: Finished difference. Result has 426 places, 532 transitions, 9875 flow [2024-06-03 20:50:27,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9624, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9875, PETRI_PLACES=426, PETRI_TRANSITIONS=532} [2024-06-03 20:50:27,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-03 20:50:27,864 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 532 transitions, 9875 flow [2024-06-03 20:50:27,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:27,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:27,865 INFO L208 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 20:50:27,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:50:27,865 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 20:50:27,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:27,865 INFO L85 PathProgramCache]: Analyzing trace with hash 2053588236, now seen corresponding path program 11 times [2024-06-03 20:50:27,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:27,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997162995] [2024-06-03 20:50:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:27,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:28,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:28,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997162995] [2024-06-03 20:50:28,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997162995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:28,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:28,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:28,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111609917] [2024-06-03 20:50:28,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:28,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:28,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:28,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:28,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:28,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:28,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 532 transitions, 9875 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:28,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:28,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:28,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:29,255 INFO L124 PetriNetUnfolderBase]: 2858/4779 cut-off events. [2024-06-03 20:50:29,256 INFO L125 PetriNetUnfolderBase]: For 534707/534707 co-relation queries the response was YES. [2024-06-03 20:50:29,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37052 conditions, 4779 events. 2858/4779 cut-off events. For 534707/534707 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 30994 event pairs, 569 based on Foata normal form. 2/4774 useless extension candidates. Maximal degree in co-relation 36871. Up to 4077 conditions per place. [2024-06-03 20:50:29,320 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 396 selfloop transitions, 156 changer transitions 0/558 dead transitions. [2024-06-03 20:50:29,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 558 transitions, 11041 flow [2024-06-03 20:50:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:50:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:50:29,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-03 20:50:29,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:50:29,321 INFO L175 Difference]: Start difference. First operand has 426 places, 532 transitions, 9875 flow. Second operand 12 states and 252 transitions. [2024-06-03 20:50:29,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 558 transitions, 11041 flow [2024-06-03 20:50:32,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 558 transitions, 10865 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:32,514 INFO L231 Difference]: Finished difference. Result has 433 places, 532 transitions, 10016 flow [2024-06-03 20:50:32,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9699, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10016, PETRI_PLACES=433, PETRI_TRANSITIONS=532} [2024-06-03 20:50:32,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-03 20:50:32,514 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 532 transitions, 10016 flow [2024-06-03 20:50:32,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:32,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:32,514 INFO L208 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 20:50:32,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:50:32,514 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 20:50:32,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:32,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2093116444, now seen corresponding path program 12 times [2024-06-03 20:50:32,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:32,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907122598] [2024-06-03 20:50:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:32,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:32,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:32,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907122598] [2024-06-03 20:50:32,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907122598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:32,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:32,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:32,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307758903] [2024-06-03 20:50:32,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:32,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:32,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:32,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:32,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:32,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:32,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 532 transitions, 10016 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:32,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:32,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:32,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:33,828 INFO L124 PetriNetUnfolderBase]: 2861/4793 cut-off events. [2024-06-03 20:50:33,829 INFO L125 PetriNetUnfolderBase]: For 544254/544254 co-relation queries the response was YES. [2024-06-03 20:50:33,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37007 conditions, 4793 events. 2861/4793 cut-off events. For 544254/544254 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31147 event pairs, 563 based on Foata normal form. 4/4792 useless extension candidates. Maximal degree in co-relation 36825. Up to 4217 conditions per place. [2024-06-03 20:50:33,902 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 481 selfloop transitions, 71 changer transitions 0/558 dead transitions. [2024-06-03 20:50:33,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 558 transitions, 11224 flow [2024-06-03 20:50:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:33,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:50:33,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:50:33,903 INFO L175 Difference]: Start difference. First operand has 433 places, 532 transitions, 10016 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:50:33,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 558 transitions, 11224 flow [2024-06-03 20:50:37,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 558 transitions, 10901 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-03 20:50:37,026 INFO L231 Difference]: Finished difference. Result has 431 places, 534 transitions, 9895 flow [2024-06-03 20:50:37,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9693, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9895, PETRI_PLACES=431, PETRI_TRANSITIONS=534} [2024-06-03 20:50:37,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-03 20:50:37,027 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 534 transitions, 9895 flow [2024-06-03 20:50:37,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:37,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:37,027 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 20:50:37,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:50:37,028 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 20:50:37,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:37,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2093301142, now seen corresponding path program 4 times [2024-06-03 20:50:37,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:37,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008999803] [2024-06-03 20:50:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:37,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:37,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:37,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008999803] [2024-06-03 20:50:37,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008999803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:37,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:37,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:37,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9633529] [2024-06-03 20:50:37,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:37,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:37,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:37,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:37,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:37,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:37,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 534 transitions, 9895 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:37,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:37,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:37,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:38,274 INFO L124 PetriNetUnfolderBase]: 2849/4769 cut-off events. [2024-06-03 20:50:38,274 INFO L125 PetriNetUnfolderBase]: For 527588/527588 co-relation queries the response was YES. [2024-06-03 20:50:38,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36544 conditions, 4769 events. 2849/4769 cut-off events. For 527588/527588 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 30929 event pairs, 570 based on Foata normal form. 2/4766 useless extension candidates. Maximal degree in co-relation 36361. Up to 4136 conditions per place. [2024-06-03 20:50:38,347 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 443 selfloop transitions, 103 changer transitions 0/552 dead transitions. [2024-06-03 20:50:38,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 552 transitions, 11031 flow [2024-06-03 20:50:38,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-03 20:50:38,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-03 20:50:38,348 INFO L175 Difference]: Start difference. First operand has 431 places, 534 transitions, 9895 flow. Second operand 7 states and 159 transitions. [2024-06-03 20:50:38,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 552 transitions, 11031 flow [2024-06-03 20:50:41,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 552 transitions, 10870 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 20:50:41,984 INFO L231 Difference]: Finished difference. Result has 434 places, 534 transitions, 9946 flow [2024-06-03 20:50:41,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9734, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9946, PETRI_PLACES=434, PETRI_TRANSITIONS=534} [2024-06-03 20:50:41,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-03 20:50:41,985 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 534 transitions, 9946 flow [2024-06-03 20:50:41,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:41,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:41,985 INFO L208 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 20:50:41,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:50:41,985 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 20:50:41,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:41,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1099459754, now seen corresponding path program 13 times [2024-06-03 20:50:41,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:41,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345244461] [2024-06-03 20:50:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:41,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:42,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:42,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345244461] [2024-06-03 20:50:42,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345244461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:42,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:42,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:42,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367968353] [2024-06-03 20:50:42,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:42,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:42,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:42,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:42,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:42,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:42,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 534 transitions, 9946 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:42,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:42,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:42,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:43,259 INFO L124 PetriNetUnfolderBase]: 2852/4771 cut-off events. [2024-06-03 20:50:43,259 INFO L125 PetriNetUnfolderBase]: For 536834/536834 co-relation queries the response was YES. [2024-06-03 20:50:43,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36430 conditions, 4771 events. 2852/4771 cut-off events. For 536834/536834 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 30918 event pairs, 555 based on Foata normal form. 4/4770 useless extension candidates. Maximal degree in co-relation 36246. Up to 4138 conditions per place. [2024-06-03 20:50:43,328 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 452 selfloop transitions, 102 changer transitions 0/560 dead transitions. [2024-06-03 20:50:43,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 560 transitions, 11162 flow [2024-06-03 20:50:43,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:43,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:50:43,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 20:50:43,329 INFO L175 Difference]: Start difference. First operand has 434 places, 534 transitions, 9946 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:50:43,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 560 transitions, 11162 flow [2024-06-03 20:50:46,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 560 transitions, 10861 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:46,905 INFO L231 Difference]: Finished difference. Result has 434 places, 536 transitions, 9912 flow [2024-06-03 20:50:46,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9645, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9912, PETRI_PLACES=434, PETRI_TRANSITIONS=536} [2024-06-03 20:50:46,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-03 20:50:46,906 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 536 transitions, 9912 flow [2024-06-03 20:50:46,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:46,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:46,906 INFO L208 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 20:50:46,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:50:46,906 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 20:50:46,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:46,907 INFO L85 PathProgramCache]: Analyzing trace with hash -821013766, now seen corresponding path program 14 times [2024-06-03 20:50:46,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:46,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119903213] [2024-06-03 20:50:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:46,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:47,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:47,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119903213] [2024-06-03 20:50:47,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119903213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:47,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:47,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:47,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73999546] [2024-06-03 20:50:47,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:47,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:47,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:47,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:47,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:47,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:47,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 536 transitions, 9912 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:47,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:47,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:47,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:48,263 INFO L124 PetriNetUnfolderBase]: 2842/4762 cut-off events. [2024-06-03 20:50:48,264 INFO L125 PetriNetUnfolderBase]: For 518040/518040 co-relation queries the response was YES. [2024-06-03 20:50:48,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35837 conditions, 4762 events. 2842/4762 cut-off events. For 518040/518040 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 30944 event pairs, 448 based on Foata normal form. 4/4761 useless extension candidates. Maximal degree in co-relation 35652. Up to 3831 conditions per place. [2024-06-03 20:50:48,326 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 437 selfloop transitions, 123 changer transitions 0/566 dead transitions. [2024-06-03 20:50:48,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 566 transitions, 11154 flow [2024-06-03 20:50:48,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:48,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:50:48,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-03 20:50:48,327 INFO L175 Difference]: Start difference. First operand has 434 places, 536 transitions, 9912 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:50:48,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 566 transitions, 11154 flow [2024-06-03 20:50:51,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 566 transitions, 10925 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-03 20:50:51,919 INFO L231 Difference]: Finished difference. Result has 438 places, 538 transitions, 10018 flow [2024-06-03 20:50:51,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9685, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10018, PETRI_PLACES=438, PETRI_TRANSITIONS=538} [2024-06-03 20:50:51,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-03 20:50:51,920 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 538 transitions, 10018 flow [2024-06-03 20:50:51,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:51,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:51,920 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] [2024-06-03 20:50:51,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:50:51,920 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 20:50:51,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:51,920 INFO L85 PathProgramCache]: Analyzing trace with hash -657803788, now seen corresponding path program 5 times [2024-06-03 20:50:51,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:51,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201866044] [2024-06-03 20:50:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:51,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:52,225 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 20:50:52,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:52,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201866044] [2024-06-03 20:50:52,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201866044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:52,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:52,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:52,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172437881] [2024-06-03 20:50:52,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:52,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:52,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:52,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:52,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:52,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:52,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 538 transitions, 10018 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:52,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:52,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:52,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:53,203 INFO L124 PetriNetUnfolderBase]: 2850/4777 cut-off events. [2024-06-03 20:50:53,203 INFO L125 PetriNetUnfolderBase]: For 514636/514636 co-relation queries the response was YES. [2024-06-03 20:50:53,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36292 conditions, 4777 events. 2850/4777 cut-off events. For 514636/514636 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 31039 event pairs, 535 based on Foata normal form. 2/4778 useless extension candidates. Maximal degree in co-relation 36105. Up to 4352 conditions per place. [2024-06-03 20:50:53,275 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 516 selfloop transitions, 33 changer transitions 0/555 dead transitions. [2024-06-03 20:50:53,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 555 transitions, 11203 flow [2024-06-03 20:50:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-03 20:50:53,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-03 20:50:53,275 INFO L175 Difference]: Start difference. First operand has 438 places, 538 transitions, 10018 flow. Second operand 7 states and 149 transitions. [2024-06-03 20:50:53,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 555 transitions, 11203 flow [2024-06-03 20:50:57,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 555 transitions, 10896 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:57,012 INFO L231 Difference]: Finished difference. Result has 439 places, 540 transitions, 9838 flow [2024-06-03 20:50:57,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9711, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9838, PETRI_PLACES=439, PETRI_TRANSITIONS=540} [2024-06-03 20:50:57,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-03 20:50:57,012 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 540 transitions, 9838 flow [2024-06-03 20:50:57,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:57,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:57,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:57,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:50:57,013 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 20:50:57,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:57,013 INFO L85 PathProgramCache]: Analyzing trace with hash -567756026, now seen corresponding path program 6 times [2024-06-03 20:50:57,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:57,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352985059] [2024-06-03 20:50:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:57,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:57,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:57,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352985059] [2024-06-03 20:50:57,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352985059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:57,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:57,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:57,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836352702] [2024-06-03 20:50:57,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:57,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:57,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:57,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:57,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:57,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:57,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 540 transitions, 9838 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:57,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:57,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:57,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:58,263 INFO L124 PetriNetUnfolderBase]: 2858/4785 cut-off events. [2024-06-03 20:50:58,263 INFO L125 PetriNetUnfolderBase]: For 520795/520795 co-relation queries the response was YES. [2024-06-03 20:50:58,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35980 conditions, 4785 events. 2858/4785 cut-off events. For 520795/520795 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31105 event pairs, 531 based on Foata normal form. 2/4786 useless extension candidates. Maximal degree in co-relation 35793. Up to 4348 conditions per place. [2024-06-03 20:50:58,331 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 516 selfloop transitions, 37 changer transitions 0/559 dead transitions. [2024-06-03 20:50:58,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 559 transitions, 11029 flow [2024-06-03 20:50:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 20:50:58,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-03 20:50:58,332 INFO L175 Difference]: Start difference. First operand has 439 places, 540 transitions, 9838 flow. Second operand 8 states and 167 transitions. [2024-06-03 20:50:58,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 559 transitions, 11029 flow [2024-06-03 20:51:01,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 559 transitions, 10927 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:01,722 INFO L231 Difference]: Finished difference. Result has 442 places, 542 transitions, 9864 flow [2024-06-03 20:51:01,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9736, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9864, PETRI_PLACES=442, PETRI_TRANSITIONS=542} [2024-06-03 20:51:01,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-03 20:51:01,722 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 542 transitions, 9864 flow [2024-06-03 20:51:01,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:01,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:01,722 INFO L208 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 20:51:01,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:51:01,723 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 20:51:01,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash -753828287, now seen corresponding path program 17 times [2024-06-03 20:51:01,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:01,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903207536] [2024-06-03 20:51:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:01,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:02,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:02,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903207536] [2024-06-03 20:51:02,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903207536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:02,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:02,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:02,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276689308] [2024-06-03 20:51:02,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:02,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:02,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:02,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:02,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:02,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:02,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 542 transitions, 9864 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:02,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:02,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:02,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:02,956 INFO L124 PetriNetUnfolderBase]: 2863/4803 cut-off events. [2024-06-03 20:51:02,956 INFO L125 PetriNetUnfolderBase]: For 526680/526683 co-relation queries the response was YES. [2024-06-03 20:51:03,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36082 conditions, 4803 events. 2863/4803 cut-off events. For 526680/526683 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31356 event pairs, 614 based on Foata normal form. 3/4798 useless extension candidates. Maximal degree in co-relation 35894. Up to 3855 conditions per place. [2024-06-03 20:51:03,027 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 351 selfloop transitions, 210 changer transitions 0/567 dead transitions. [2024-06-03 20:51:03,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 567 transitions, 11559 flow [2024-06-03 20:51:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:03,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:51:03,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 20:51:03,028 INFO L175 Difference]: Start difference. First operand has 442 places, 542 transitions, 9864 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:51:03,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 567 transitions, 11559 flow [2024-06-03 20:51:06,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 567 transitions, 11454 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:06,124 INFO L231 Difference]: Finished difference. Result has 443 places, 545 transitions, 10240 flow [2024-06-03 20:51:06,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9759, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10240, PETRI_PLACES=443, PETRI_TRANSITIONS=545} [2024-06-03 20:51:06,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-03 20:51:06,124 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 545 transitions, 10240 flow [2024-06-03 20:51:06,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:06,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:06,125 INFO L208 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 20:51:06,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:51:06,125 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 20:51:06,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1183860147, now seen corresponding path program 18 times [2024-06-03 20:51:06,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:06,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98674837] [2024-06-03 20:51:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:06,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:06,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:06,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98674837] [2024-06-03 20:51:06,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98674837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:06,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:06,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:06,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75514761] [2024-06-03 20:51:06,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:06,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:06,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:06,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:06,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:06,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:06,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 545 transitions, 10240 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:06,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:06,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:06,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:07,459 INFO L124 PetriNetUnfolderBase]: 2860/4797 cut-off events. [2024-06-03 20:51:07,459 INFO L125 PetriNetUnfolderBase]: For 529161/529164 co-relation queries the response was YES. [2024-06-03 20:51:07,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36432 conditions, 4797 events. 2860/4797 cut-off events. For 529161/529164 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31310 event pairs, 548 based on Foata normal form. 3/4798 useless extension candidates. Maximal degree in co-relation 36243. Up to 4069 conditions per place. [2024-06-03 20:51:07,531 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 425 selfloop transitions, 147 changer transitions 0/578 dead transitions. [2024-06-03 20:51:07,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 578 transitions, 11744 flow [2024-06-03 20:51:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 20:51:07,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-03 20:51:07,532 INFO L175 Difference]: Start difference. First operand has 443 places, 545 transitions, 10240 flow. Second operand 8 states and 194 transitions. [2024-06-03 20:51:07,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 578 transitions, 11744 flow [2024-06-03 20:51:10,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 578 transitions, 11326 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:10,852 INFO L231 Difference]: Finished difference. Result has 448 places, 546 transitions, 10211 flow [2024-06-03 20:51:10,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9824, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10211, PETRI_PLACES=448, PETRI_TRANSITIONS=546} [2024-06-03 20:51:10,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-03 20:51:10,853 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 546 transitions, 10211 flow [2024-06-03 20:51:10,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:10,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:10,853 INFO L208 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 20:51:10,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:51:10,853 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 20:51:10,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:10,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1191217377, now seen corresponding path program 19 times [2024-06-03 20:51:10,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:10,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547849436] [2024-06-03 20:51:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:10,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:11,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:11,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547849436] [2024-06-03 20:51:11,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547849436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:11,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:11,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:11,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775871131] [2024-06-03 20:51:11,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:11,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:11,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:11,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:11,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:11,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:11,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 546 transitions, 10211 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:11,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:11,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:11,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:12,189 INFO L124 PetriNetUnfolderBase]: 2857/4793 cut-off events. [2024-06-03 20:51:12,189 INFO L125 PetriNetUnfolderBase]: For 529032/529035 co-relation queries the response was YES. [2024-06-03 20:51:12,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36344 conditions, 4793 events. 2857/4793 cut-off events. For 529032/529035 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31275 event pairs, 548 based on Foata normal form. 3/4794 useless extension candidates. Maximal degree in co-relation 36153. Up to 4066 conditions per place. [2024-06-03 20:51:12,262 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 409 selfloop transitions, 162 changer transitions 0/577 dead transitions. [2024-06-03 20:51:12,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 577 transitions, 11681 flow [2024-06-03 20:51:12,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 20:51:12,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-03 20:51:12,263 INFO L175 Difference]: Start difference. First operand has 448 places, 546 transitions, 10211 flow. Second operand 7 states and 177 transitions. [2024-06-03 20:51:12,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 577 transitions, 11681 flow [2024-06-03 20:51:16,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 577 transitions, 11351 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:16,030 INFO L231 Difference]: Finished difference. Result has 449 places, 547 transitions, 10340 flow [2024-06-03 20:51:16,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9883, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10340, PETRI_PLACES=449, PETRI_TRANSITIONS=547} [2024-06-03 20:51:16,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-03 20:51:16,030 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 547 transitions, 10340 flow [2024-06-03 20:51:16,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:16,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:16,031 INFO L208 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 20:51:16,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:51:16,031 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 20:51:16,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:16,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1191211797, now seen corresponding path program 20 times [2024-06-03 20:51:16,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:16,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684470731] [2024-06-03 20:51:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:16,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:16,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:16,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684470731] [2024-06-03 20:51:16,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684470731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:16,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:16,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:16,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52926008] [2024-06-03 20:51:16,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:16,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:16,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:16,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:16,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:16,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:16,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 547 transitions, 10340 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:16,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:16,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:16,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:17,278 INFO L124 PetriNetUnfolderBase]: 2854/4789 cut-off events. [2024-06-03 20:51:17,279 INFO L125 PetriNetUnfolderBase]: For 523027/523030 co-relation queries the response was YES. [2024-06-03 20:51:17,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36472 conditions, 4789 events. 2854/4789 cut-off events. For 523027/523030 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31241 event pairs, 538 based on Foata normal form. 3/4790 useless extension candidates. Maximal degree in co-relation 36280. Up to 4063 conditions per place. [2024-06-03 20:51:17,348 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 419 selfloop transitions, 148 changer transitions 0/573 dead transitions. [2024-06-03 20:51:17,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 573 transitions, 11540 flow [2024-06-03 20:51:17,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 20:51:17,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-03 20:51:17,349 INFO L175 Difference]: Start difference. First operand has 449 places, 547 transitions, 10340 flow. Second operand 7 states and 172 transitions. [2024-06-03 20:51:17,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 573 transitions, 11540 flow [2024-06-03 20:51:20,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 573 transitions, 11362 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:20,837 INFO L231 Difference]: Finished difference. Result has 452 places, 547 transitions, 10478 flow [2024-06-03 20:51:20,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10162, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10478, PETRI_PLACES=452, PETRI_TRANSITIONS=547} [2024-06-03 20:51:20,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-03 20:51:20,838 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 547 transitions, 10478 flow [2024-06-03 20:51:20,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:20,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:20,838 INFO L208 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 20:51:20,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:51:20,838 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 20:51:20,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:20,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1584625977, now seen corresponding path program 21 times [2024-06-03 20:51:20,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:20,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098935493] [2024-06-03 20:51:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:20,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:21,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:21,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098935493] [2024-06-03 20:51:21,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098935493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:21,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:21,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:21,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894413797] [2024-06-03 20:51:21,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:21,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:21,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:21,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:21,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:21,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:21,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 547 transitions, 10478 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:21,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:21,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:21,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:22,091 INFO L124 PetriNetUnfolderBase]: 2851/4787 cut-off events. [2024-06-03 20:51:22,091 INFO L125 PetriNetUnfolderBase]: For 527855/527858 co-relation queries the response was YES. [2024-06-03 20:51:22,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36518 conditions, 4787 events. 2851/4787 cut-off events. For 527855/527858 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31279 event pairs, 614 based on Foata normal form. 3/4782 useless extension candidates. Maximal degree in co-relation 36325. Up to 3843 conditions per place. [2024-06-03 20:51:22,167 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 353 selfloop transitions, 205 changer transitions 0/564 dead transitions. [2024-06-03 20:51:22,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 564 transitions, 11636 flow [2024-06-03 20:51:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:51:22,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:51:22,168 INFO L175 Difference]: Start difference. First operand has 452 places, 547 transitions, 10478 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:51:22,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 564 transitions, 11636 flow [2024-06-03 20:51:25,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 564 transitions, 11105 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-03 20:51:25,859 INFO L231 Difference]: Finished difference. Result has 449 places, 547 transitions, 10364 flow [2024-06-03 20:51:25,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9947, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10364, PETRI_PLACES=449, PETRI_TRANSITIONS=547} [2024-06-03 20:51:25,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-03 20:51:25,859 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 547 transitions, 10364 flow [2024-06-03 20:51:25,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:25,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:25,859 INFO L208 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 20:51:25,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:51:25,859 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 20:51:25,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:25,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1994082268, now seen corresponding path program 7 times [2024-06-03 20:51:25,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:25,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540827404] [2024-06-03 20:51:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:25,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:26,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:26,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540827404] [2024-06-03 20:51:26,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540827404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:26,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:26,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:26,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822648013] [2024-06-03 20:51:26,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:26,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:26,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:26,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:26,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:26,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 547 transitions, 10364 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:26,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:26,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:26,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:27,255 INFO L124 PetriNetUnfolderBase]: 2887/4836 cut-off events. [2024-06-03 20:51:27,256 INFO L125 PetriNetUnfolderBase]: For 595604/595607 co-relation queries the response was YES. [2024-06-03 20:51:27,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36990 conditions, 4836 events. 2887/4836 cut-off events. For 595604/595607 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 31539 event pairs, 551 based on Foata normal form. 12/4841 useless extension candidates. Maximal degree in co-relation 36796. Up to 4197 conditions per place. [2024-06-03 20:51:27,326 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 490 selfloop transitions, 79 changer transitions 0/575 dead transitions. [2024-06-03 20:51:27,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 575 transitions, 11643 flow [2024-06-03 20:51:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-03 20:51:27,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-03 20:51:27,327 INFO L175 Difference]: Start difference. First operand has 449 places, 547 transitions, 10364 flow. Second operand 6 states and 152 transitions. [2024-06-03 20:51:27,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 575 transitions, 11643 flow [2024-06-03 20:51:30,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 575 transitions, 11206 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:30,573 INFO L231 Difference]: Finished difference. Result has 449 places, 549 transitions, 10157 flow [2024-06-03 20:51:30,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9927, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10157, PETRI_PLACES=449, PETRI_TRANSITIONS=549} [2024-06-03 20:51:30,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-03 20:51:30,573 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 549 transitions, 10157 flow [2024-06-03 20:51:30,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:30,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:30,574 INFO L208 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 20:51:30,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:51:30,574 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 20:51:30,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:30,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1083176866, now seen corresponding path program 8 times [2024-06-03 20:51:30,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:30,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715345997] [2024-06-03 20:51:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:30,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:30,870 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 20:51:30,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:30,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715345997] [2024-06-03 20:51:30,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715345997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:30,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:30,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:30,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711771818] [2024-06-03 20:51:30,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:30,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:30,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:30,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:30,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:30,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:30,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 549 transitions, 10157 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:30,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:30,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:30,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:31,877 INFO L124 PetriNetUnfolderBase]: 2877/4825 cut-off events. [2024-06-03 20:51:31,877 INFO L125 PetriNetUnfolderBase]: For 544001/544004 co-relation queries the response was YES. [2024-06-03 20:51:31,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35822 conditions, 4825 events. 2877/4825 cut-off events. For 544001/544004 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 31395 event pairs, 421 based on Foata normal form. 12/4835 useless extension candidates. Maximal degree in co-relation 35627. Up to 3856 conditions per place. [2024-06-03 20:51:31,947 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 494 selfloop transitions, 82 changer transitions 0/582 dead transitions. [2024-06-03 20:51:31,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 582 transitions, 11728 flow [2024-06-03 20:51:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 20:51:31,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-03 20:51:31,948 INFO L175 Difference]: Start difference. First operand has 449 places, 549 transitions, 10157 flow. Second operand 6 states and 156 transitions. [2024-06-03 20:51:31,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 582 transitions, 11728 flow [2024-06-03 20:51:35,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 582 transitions, 11538 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:35,325 INFO L231 Difference]: Finished difference. Result has 450 places, 551 transitions, 10206 flow [2024-06-03 20:51:35,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9969, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10206, PETRI_PLACES=450, PETRI_TRANSITIONS=551} [2024-06-03 20:51:35,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-03 20:51:35,325 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 551 transitions, 10206 flow [2024-06-03 20:51:35,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:35,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:35,326 INFO L208 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 20:51:35,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:51:35,326 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 20:51:35,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:35,326 INFO L85 PathProgramCache]: Analyzing trace with hash -806246654, now seen corresponding path program 9 times [2024-06-03 20:51:35,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:35,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969121746] [2024-06-03 20:51:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:35,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:35,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:35,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969121746] [2024-06-03 20:51:35,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969121746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:35,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:35,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:35,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101753425] [2024-06-03 20:51:35,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:35,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:35,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:35,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:35,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 551 transitions, 10206 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:35,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:35,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:35,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:36,597 INFO L124 PetriNetUnfolderBase]: 2865/4802 cut-off events. [2024-06-03 20:51:36,597 INFO L125 PetriNetUnfolderBase]: For 472360/472360 co-relation queries the response was YES. [2024-06-03 20:51:36,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35455 conditions, 4802 events. 2865/4802 cut-off events. For 472360/472360 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 31317 event pairs, 533 based on Foata normal form. 2/4803 useless extension candidates. Maximal degree in co-relation 35260. Up to 4219 conditions per place. [2024-06-03 20:51:36,670 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 485 selfloop transitions, 88 changer transitions 0/579 dead transitions. [2024-06-03 20:51:36,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 579 transitions, 11422 flow [2024-06-03 20:51:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 20:51:36,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-03 20:51:36,671 INFO L175 Difference]: Start difference. First operand has 450 places, 551 transitions, 10206 flow. Second operand 8 states and 187 transitions. [2024-06-03 20:51:36,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 579 transitions, 11422 flow [2024-06-03 20:51:39,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 579 transitions, 11233 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:39,422 INFO L231 Difference]: Finished difference. Result has 454 places, 551 transitions, 10202 flow [2024-06-03 20:51:39,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10017, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10202, PETRI_PLACES=454, PETRI_TRANSITIONS=551} [2024-06-03 20:51:39,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-03 20:51:39,423 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 551 transitions, 10202 flow [2024-06-03 20:51:39,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:39,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:39,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:39,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:51:39,423 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 20:51:39,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:39,424 INFO L85 PathProgramCache]: Analyzing trace with hash -805829084, now seen corresponding path program 10 times [2024-06-03 20:51:39,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:39,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8607277] [2024-06-03 20:51:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:39,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:39,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:39,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8607277] [2024-06-03 20:51:39,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8607277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:39,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:39,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:39,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712671951] [2024-06-03 20:51:39,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:39,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:39,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:39,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:39,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:39,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:39,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 551 transitions, 10202 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:39,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:39,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:39,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:40,766 INFO L124 PetriNetUnfolderBase]: 2873/4803 cut-off events. [2024-06-03 20:51:40,766 INFO L125 PetriNetUnfolderBase]: For 470973/470973 co-relation queries the response was YES. [2024-06-03 20:51:40,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35339 conditions, 4803 events. 2873/4803 cut-off events. For 470973/470973 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 31231 event pairs, 520 based on Foata normal form. 2/4799 useless extension candidates. Maximal degree in co-relation 35144. Up to 4131 conditions per place. [2024-06-03 20:51:40,837 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 478 selfloop transitions, 101 changer transitions 0/585 dead transitions. [2024-06-03 20:51:40,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 585 transitions, 11509 flow [2024-06-03 20:51:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:51:40,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-03 20:51:40,838 INFO L175 Difference]: Start difference. First operand has 454 places, 551 transitions, 10202 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:51:40,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 585 transitions, 11509 flow [2024-06-03 20:51:43,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 585 transitions, 11247 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:43,813 INFO L231 Difference]: Finished difference. Result has 454 places, 553 transitions, 10203 flow [2024-06-03 20:51:43,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9940, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10203, PETRI_PLACES=454, PETRI_TRANSITIONS=553} [2024-06-03 20:51:43,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-03 20:51:43,813 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 553 transitions, 10203 flow [2024-06-03 20:51:43,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:43,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:43,814 INFO L208 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 20:51:43,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:51:43,814 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 20:51:43,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1150994686, now seen corresponding path program 11 times [2024-06-03 20:51:43,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:43,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619848646] [2024-06-03 20:51:43,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:43,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:44,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:44,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619848646] [2024-06-03 20:51:44,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619848646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:44,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:44,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:44,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964221888] [2024-06-03 20:51:44,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:44,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:44,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:44,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:44,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:44,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:44,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 553 transitions, 10203 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:44,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:44,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:44,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:45,202 INFO L124 PetriNetUnfolderBase]: 2868/4810 cut-off events. [2024-06-03 20:51:45,203 INFO L125 PetriNetUnfolderBase]: For 471230/471233 co-relation queries the response was YES. [2024-06-03 20:51:45,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34598 conditions, 4810 events. 2868/4810 cut-off events. For 471230/471233 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 31298 event pairs, 381 based on Foata normal form. 10/4818 useless extension candidates. Maximal degree in co-relation 34402. Up to 3681 conditions per place. [2024-06-03 20:51:45,273 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 489 selfloop transitions, 91 changer transitions 0/586 dead transitions. [2024-06-03 20:51:45,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 586 transitions, 11772 flow [2024-06-03 20:51:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:45,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:51:45,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:51:45,274 INFO L175 Difference]: Start difference. First operand has 454 places, 553 transitions, 10203 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:51:45,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 586 transitions, 11772 flow [2024-06-03 20:51:47,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 586 transitions, 11530 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:47,682 INFO L231 Difference]: Finished difference. Result has 455 places, 555 transitions, 10206 flow [2024-06-03 20:51:47,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9967, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10206, PETRI_PLACES=455, PETRI_TRANSITIONS=555} [2024-06-03 20:51:47,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-03 20:51:47,683 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 555 transitions, 10206 flow [2024-06-03 20:51:47,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:47,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:47,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:47,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:51:47,683 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 20:51:47,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:47,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1145280766, now seen corresponding path program 12 times [2024-06-03 20:51:47,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:47,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099802509] [2024-06-03 20:51:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:47,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:47,978 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 20:51:47,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:47,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099802509] [2024-06-03 20:51:47,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099802509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:47,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:47,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:47,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531182203] [2024-06-03 20:51:47,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:47,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:47,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:47,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:47,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:48,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:48,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 555 transitions, 10206 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:48,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:48,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:48,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:49,022 INFO L124 PetriNetUnfolderBase]: 2856/4788 cut-off events. [2024-06-03 20:51:49,022 INFO L125 PetriNetUnfolderBase]: For 413235/413238 co-relation queries the response was YES. [2024-06-03 20:51:49,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34238 conditions, 4788 events. 2856/4788 cut-off events. For 413235/413238 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 31180 event pairs, 372 based on Foata normal form. 4/4790 useless extension candidates. Maximal degree in co-relation 34041. Up to 3673 conditions per place. [2024-06-03 20:51:49,095 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 485 selfloop transitions, 96 changer transitions 0/587 dead transitions. [2024-06-03 20:51:49,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 587 transitions, 11488 flow [2024-06-03 20:51:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-03 20:51:49,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-03 20:51:49,096 INFO L175 Difference]: Start difference. First operand has 455 places, 555 transitions, 10206 flow. Second operand 7 states and 174 transitions. [2024-06-03 20:51:49,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 587 transitions, 11488 flow [2024-06-03 20:51:52,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 587 transitions, 11259 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:52,655 INFO L231 Difference]: Finished difference. Result has 458 places, 555 transitions, 10174 flow [2024-06-03 20:51:52,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9977, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10174, PETRI_PLACES=458, PETRI_TRANSITIONS=555} [2024-06-03 20:51:52,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-03 20:51:52,656 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 555 transitions, 10174 flow [2024-06-03 20:51:52,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:52,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:52,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:52,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:51:52,656 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 20:51:52,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:52,657 INFO L85 PathProgramCache]: Analyzing trace with hash -486751396, now seen corresponding path program 1 times [2024-06-03 20:51:52,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:52,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80386434] [2024-06-03 20:51:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:52,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:52,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:52,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80386434] [2024-06-03 20:51:52,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80386434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:52,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:52,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:52,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944290410] [2024-06-03 20:51:52,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:52,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:52,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:52,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:52,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:53,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:53,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 555 transitions, 10174 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:53,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:53,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:53,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:53,972 INFO L124 PetriNetUnfolderBase]: 2942/4917 cut-off events. [2024-06-03 20:51:53,972 INFO L125 PetriNetUnfolderBase]: For 539204/539204 co-relation queries the response was YES. [2024-06-03 20:51:54,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36336 conditions, 4917 events. 2942/4917 cut-off events. For 539204/539204 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 32025 event pairs, 457 based on Foata normal form. 6/4911 useless extension candidates. Maximal degree in co-relation 36138. Up to 2752 conditions per place. [2024-06-03 20:51:54,046 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 449 selfloop transitions, 145 changer transitions 0/600 dead transitions. [2024-06-03 20:51:54,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 600 transitions, 12036 flow [2024-06-03 20:51:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-03 20:51:54,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:51:54,047 INFO L175 Difference]: Start difference. First operand has 458 places, 555 transitions, 10174 flow. Second operand 10 states and 230 transitions. [2024-06-03 20:51:54,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 600 transitions, 12036 flow [2024-06-03 20:51:57,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 600 transitions, 11810 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:57,405 INFO L231 Difference]: Finished difference. Result has 461 places, 558 transitions, 10292 flow [2024-06-03 20:51:57,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9948, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10292, PETRI_PLACES=461, PETRI_TRANSITIONS=558} [2024-06-03 20:51:57,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-03 20:51:57,406 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 558 transitions, 10292 flow [2024-06-03 20:51:57,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:57,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:57,406 INFO L208 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 20:51:57,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:51:57,407 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 20:51:57,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:57,407 INFO L85 PathProgramCache]: Analyzing trace with hash -486631426, now seen corresponding path program 2 times [2024-06-03 20:51:57,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:57,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180802916] [2024-06-03 20:51:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:57,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:57,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:57,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180802916] [2024-06-03 20:51:57,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180802916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:57,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:57,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:57,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374313676] [2024-06-03 20:51:57,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:57,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:57,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:57,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:57,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:57,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:57,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 558 transitions, 10292 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:57,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:57,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:57,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:58,807 INFO L124 PetriNetUnfolderBase]: 2970/4974 cut-off events. [2024-06-03 20:51:58,807 INFO L125 PetriNetUnfolderBase]: For 547266/547269 co-relation queries the response was YES. [2024-06-03 20:51:58,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36730 conditions, 4974 events. 2970/4974 cut-off events. For 547266/547269 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 32566 event pairs, 451 based on Foata normal form. 8/4980 useless extension candidates. Maximal degree in co-relation 36531. Up to 4271 conditions per place. [2024-06-03 20:51:58,882 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 530 selfloop transitions, 55 changer transitions 0/591 dead transitions. [2024-06-03 20:51:58,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 591 transitions, 11584 flow [2024-06-03 20:51:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 20:51:58,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:51:58,883 INFO L175 Difference]: Start difference. First operand has 461 places, 558 transitions, 10292 flow. Second operand 8 states and 180 transitions. [2024-06-03 20:51:58,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 591 transitions, 11584 flow [2024-06-03 20:52:02,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 591 transitions, 11402 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:02,693 INFO L231 Difference]: Finished difference. Result has 464 places, 561 transitions, 10266 flow [2024-06-03 20:52:02,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10122, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10266, PETRI_PLACES=464, PETRI_TRANSITIONS=561} [2024-06-03 20:52:02,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-03 20:52:02,693 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 561 transitions, 10266 flow [2024-06-03 20:52:02,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:02,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:02,694 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] [2024-06-03 20:52:02,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:52:02,694 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 20:52:02,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:02,694 INFO L85 PathProgramCache]: Analyzing trace with hash -486631240, now seen corresponding path program 1 times [2024-06-03 20:52:02,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:02,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080929285] [2024-06-03 20:52:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:02,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:02,992 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 20:52:02,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:02,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080929285] [2024-06-03 20:52:02,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080929285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:02,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:02,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:02,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252142612] [2024-06-03 20:52:02,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:02,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:02,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:03,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:52:03,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 561 transitions, 10266 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:03,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:03,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:52:03,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:04,178 INFO L124 PetriNetUnfolderBase]: 3023/5065 cut-off events. [2024-06-03 20:52:04,178 INFO L125 PetriNetUnfolderBase]: For 600633/600636 co-relation queries the response was YES. [2024-06-03 20:52:04,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38036 conditions, 5065 events. 3023/5065 cut-off events. For 600633/600636 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 33245 event pairs, 444 based on Foata normal form. 8/5071 useless extension candidates. Maximal degree in co-relation 37835. Up to 3507 conditions per place. [2024-06-03 20:52:04,256 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 486 selfloop transitions, 109 changer transitions 0/601 dead transitions. [2024-06-03 20:52:04,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 601 transitions, 12140 flow [2024-06-03 20:52:04,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:52:04,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:52:04,257 INFO L175 Difference]: Start difference. First operand has 464 places, 561 transitions, 10266 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:52:04,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 601 transitions, 12140 flow [2024-06-03 20:52:08,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 601 transitions, 12030 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:08,762 INFO L231 Difference]: Finished difference. Result has 467 places, 563 transitions, 10422 flow [2024-06-03 20:52:08,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10156, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10422, PETRI_PLACES=467, PETRI_TRANSITIONS=563} [2024-06-03 20:52:08,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-03 20:52:08,762 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 563 transitions, 10422 flow [2024-06-03 20:52:08,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:08,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:08,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:08,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:52:08,763 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 20:52:08,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1702271288, now seen corresponding path program 2 times [2024-06-03 20:52:08,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:08,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911497561] [2024-06-03 20:52:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:08,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:09,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:09,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911497561] [2024-06-03 20:52:09,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911497561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:09,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:09,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:09,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367505114] [2024-06-03 20:52:09,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:09,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:09,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:09,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:52:09,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 563 transitions, 10422 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:09,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:09,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:52:09,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:10,249 INFO L124 PetriNetUnfolderBase]: 3043/5097 cut-off events. [2024-06-03 20:52:10,249 INFO L125 PetriNetUnfolderBase]: For 611004/611007 co-relation queries the response was YES. [2024-06-03 20:52:10,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38723 conditions, 5097 events. 3043/5097 cut-off events. For 611004/611007 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 33460 event pairs, 440 based on Foata normal form. 8/5103 useless extension candidates. Maximal degree in co-relation 38521. Up to 3519 conditions per place. [2024-06-03 20:52:10,326 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 484 selfloop transitions, 110 changer transitions 0/600 dead transitions. [2024-06-03 20:52:10,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 600 transitions, 12274 flow [2024-06-03 20:52:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:10,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:10,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 20:52:10,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:52:10,327 INFO L175 Difference]: Start difference. First operand has 467 places, 563 transitions, 10422 flow. Second operand 7 states and 175 transitions. [2024-06-03 20:52:10,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 600 transitions, 12274 flow [2024-06-03 20:52:14,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 600 transitions, 12112 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:14,817 INFO L231 Difference]: Finished difference. Result has 470 places, 564 transitions, 10510 flow [2024-06-03 20:52:14,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10263, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10510, PETRI_PLACES=470, PETRI_TRANSITIONS=564} [2024-06-03 20:52:14,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-03 20:52:14,818 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 564 transitions, 10510 flow [2024-06-03 20:52:14,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:14,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:14,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:14,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:52:14,818 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 20:52:14,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1071813866, now seen corresponding path program 3 times [2024-06-03 20:52:14,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:14,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738009892] [2024-06-03 20:52:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:14,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:15,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:15,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738009892] [2024-06-03 20:52:15,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738009892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:15,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:15,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:15,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603653531] [2024-06-03 20:52:15,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:15,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:15,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:15,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:15,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:15,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:52:15,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 564 transitions, 10510 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:15,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:15,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:52:15,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:16,293 INFO L124 PetriNetUnfolderBase]: 3063/5133 cut-off events. [2024-06-03 20:52:16,293 INFO L125 PetriNetUnfolderBase]: For 622284/622287 co-relation queries the response was YES. [2024-06-03 20:52:16,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39108 conditions, 5133 events. 3063/5133 cut-off events. For 622284/622287 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33822 event pairs, 447 based on Foata normal form. 8/5139 useless extension candidates. Maximal degree in co-relation 38905. Up to 4146 conditions per place. [2024-06-03 20:52:16,516 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 539 selfloop transitions, 59 changer transitions 0/604 dead transitions. [2024-06-03 20:52:16,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 604 transitions, 12090 flow [2024-06-03 20:52:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:16,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 20:52:16,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-03 20:52:16,517 INFO L175 Difference]: Start difference. First operand has 470 places, 564 transitions, 10510 flow. Second operand 8 states and 190 transitions. [2024-06-03 20:52:16,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 604 transitions, 12090 flow [2024-06-03 20:52:21,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 604 transitions, 11872 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:21,595 INFO L231 Difference]: Finished difference. Result has 474 places, 565 transitions, 10447 flow [2024-06-03 20:52:21,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10294, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10447, PETRI_PLACES=474, PETRI_TRANSITIONS=565} [2024-06-03 20:52:21,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-03 20:52:21,595 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 565 transitions, 10447 flow [2024-06-03 20:52:21,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:21,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:21,596 INFO L208 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 20:52:21,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:52:21,596 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 20:52:21,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:21,596 INFO L85 PathProgramCache]: Analyzing trace with hash -309262570, now seen corresponding path program 3 times [2024-06-03 20:52:21,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:21,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212948134] [2024-06-03 20:52:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:21,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:21,884 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 20:52:21,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:21,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212948134] [2024-06-03 20:52:21,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212948134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:21,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:21,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:21,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122346743] [2024-06-03 20:52:21,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:21,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:21,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:21,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:21,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:21,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:52:21,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 565 transitions, 10447 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:21,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:21,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:52:21,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:23,009 INFO L124 PetriNetUnfolderBase]: 3050/5114 cut-off events. [2024-06-03 20:52:23,009 INFO L125 PetriNetUnfolderBase]: For 572131/572134 co-relation queries the response was YES. [2024-06-03 20:52:23,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38011 conditions, 5114 events. 3050/5114 cut-off events. For 572131/572134 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33642 event pairs, 464 based on Foata normal form. 8/5120 useless extension candidates. Maximal degree in co-relation 37807. Up to 3545 conditions per place. [2024-06-03 20:52:23,095 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 489 selfloop transitions, 101 changer transitions 0/596 dead transitions. [2024-06-03 20:52:23,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 596 transitions, 11997 flow [2024-06-03 20:52:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:52:23,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:52:23,095 INFO L175 Difference]: Start difference. First operand has 474 places, 565 transitions, 10447 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:52:23,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 596 transitions, 11997 flow [2024-06-03 20:52:28,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 596 transitions, 11860 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:52:28,432 INFO L231 Difference]: Finished difference. Result has 474 places, 565 transitions, 10520 flow [2024-06-03 20:52:28,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10314, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10520, PETRI_PLACES=474, PETRI_TRANSITIONS=565} [2024-06-03 20:52:28,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-03 20:52:28,433 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 565 transitions, 10520 flow [2024-06-03 20:52:28,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:28,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:28,433 INFO L208 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 20:52:28,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:52:28,433 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 20:52:28,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:28,434 INFO L85 PathProgramCache]: Analyzing trace with hash 551800594, now seen corresponding path program 4 times [2024-06-03 20:52:28,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:28,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142434196] [2024-06-03 20:52:28,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:28,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:28,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:28,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142434196] [2024-06-03 20:52:28,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142434196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:28,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:28,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:28,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486534538] [2024-06-03 20:52:28,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:28,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:28,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:28,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:28,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:28,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:52:28,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 565 transitions, 10520 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:28,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:28,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:52:28,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:29,911 INFO L124 PetriNetUnfolderBase]: 3103/5189 cut-off events. [2024-06-03 20:52:29,912 INFO L125 PetriNetUnfolderBase]: For 613845/613845 co-relation queries the response was YES. [2024-06-03 20:52:29,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39241 conditions, 5189 events. 3103/5189 cut-off events. For 613845/613845 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 34211 event pairs, 594 based on Foata normal form. 6/5185 useless extension candidates. Maximal degree in co-relation 39037. Up to 4018 conditions per place. [2024-06-03 20:52:29,994 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 451 selfloop transitions, 151 changer transitions 0/608 dead transitions. [2024-06-03 20:52:29,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 608 transitions, 12140 flow [2024-06-03 20:52:29,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:52:29,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:52:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-03 20:52:29,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549889135254989 [2024-06-03 20:52:29,995 INFO L175 Difference]: Start difference. First operand has 474 places, 565 transitions, 10520 flow. Second operand 11 states and 248 transitions. [2024-06-03 20:52:29,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 608 transitions, 12140 flow [2024-06-03 20:52:35,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 608 transitions, 11799 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:52:35,230 INFO L231 Difference]: Finished difference. Result has 479 places, 567 transitions, 10523 flow [2024-06-03 20:52:35,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10179, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10523, PETRI_PLACES=479, PETRI_TRANSITIONS=567} [2024-06-03 20:52:35,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-03 20:52:35,230 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 567 transitions, 10523 flow [2024-06-03 20:52:35,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:35,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:35,230 INFO L208 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 20:52:35,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:52:35,230 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 20:52:35,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash 551920564, now seen corresponding path program 5 times [2024-06-03 20:52:35,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:35,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326678830] [2024-06-03 20:52:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:35,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:35,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:35,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326678830] [2024-06-03 20:52:35,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326678830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:35,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:35,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:35,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73338121] [2024-06-03 20:52:35,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:35,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:35,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:35,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:35,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:35,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:52:35,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 567 transitions, 10523 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:35,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:35,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:52:35,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:36,731 INFO L124 PetriNetUnfolderBase]: 3090/5180 cut-off events. [2024-06-03 20:52:36,731 INFO L125 PetriNetUnfolderBase]: For 575018/575021 co-relation queries the response was YES. [2024-06-03 20:52:36,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37817 conditions, 5180 events. 3090/5180 cut-off events. For 575018/575021 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 34254 event pairs, 602 based on Foata normal form. 8/5184 useless extension candidates. Maximal degree in co-relation 37613. Up to 4505 conditions per place. [2024-06-03 20:52:36,812 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 536 selfloop transitions, 55 changer transitions 0/597 dead transitions. [2024-06-03 20:52:36,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 597 transitions, 11789 flow [2024-06-03 20:52:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:52:36,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-03 20:52:36,813 INFO L175 Difference]: Start difference. First operand has 479 places, 567 transitions, 10523 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:52:36,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 597 transitions, 11789 flow [2024-06-03 20:52:41,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 597 transitions, 11477 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 20:52:41,292 INFO L231 Difference]: Finished difference. Result has 478 places, 567 transitions, 10327 flow [2024-06-03 20:52:41,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10211, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10327, PETRI_PLACES=478, PETRI_TRANSITIONS=567} [2024-06-03 20:52:41,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-03 20:52:41,293 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 567 transitions, 10327 flow [2024-06-03 20:52:41,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:41,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:41,293 INFO L208 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 20:52:41,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:52:41,293 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 20:52:41,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:41,293 INFO L85 PathProgramCache]: Analyzing trace with hash 551920750, now seen corresponding path program 4 times [2024-06-03 20:52:41,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:41,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567368248] [2024-06-03 20:52:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:41,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:41,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567368248] [2024-06-03 20:52:41,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567368248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:41,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:41,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:41,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642410048] [2024-06-03 20:52:41,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:41,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:41,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:41,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:41,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:41,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:52:41,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 567 transitions, 10327 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:41,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:41,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:52:41,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:42,757 INFO L124 PetriNetUnfolderBase]: 3077/5154 cut-off events. [2024-06-03 20:52:42,757 INFO L125 PetriNetUnfolderBase]: For 532187/532190 co-relation queries the response was YES. [2024-06-03 20:52:42,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36644 conditions, 5154 events. 3077/5154 cut-off events. For 532187/532190 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 33982 event pairs, 617 based on Foata normal form. 8/5153 useless extension candidates. Maximal degree in co-relation 36439. Up to 4332 conditions per place. [2024-06-03 20:52:42,837 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 491 selfloop transitions, 100 changer transitions 0/597 dead transitions. [2024-06-03 20:52:42,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 597 transitions, 11615 flow [2024-06-03 20:52:42,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:52:42,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-03 20:52:42,838 INFO L175 Difference]: Start difference. First operand has 478 places, 567 transitions, 10327 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:52:42,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 597 transitions, 11615 flow [2024-06-03 20:52:47,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 597 transitions, 11495 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:52:47,340 INFO L231 Difference]: Finished difference. Result has 478 places, 567 transitions, 10411 flow [2024-06-03 20:52:47,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10207, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10411, PETRI_PLACES=478, PETRI_TRANSITIONS=567} [2024-06-03 20:52:47,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-03 20:52:47,341 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 567 transitions, 10411 flow [2024-06-03 20:52:47,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:47,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:47,341 INFO L208 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 20:52:47,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:52:47,341 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 20:52:47,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:47,342 INFO L85 PathProgramCache]: Analyzing trace with hash 923660050, now seen corresponding path program 6 times [2024-06-03 20:52:47,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:47,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584551361] [2024-06-03 20:52:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:47,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:47,642 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 20:52:47,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:47,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584551361] [2024-06-03 20:52:47,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584551361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:47,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:47,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:47,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586963067] [2024-06-03 20:52:47,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:47,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:47,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:47,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:52:47,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 567 transitions, 10411 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:47,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:47,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:52:47,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:48,894 INFO L124 PetriNetUnfolderBase]: 3130/5245 cut-off events. [2024-06-03 20:52:48,894 INFO L125 PetriNetUnfolderBase]: For 581906/581906 co-relation queries the response was YES. [2024-06-03 20:52:48,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38052 conditions, 5245 events. 3130/5245 cut-off events. For 581906/581906 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 34669 event pairs, 527 based on Foata normal form. 6/5247 useless extension candidates. Maximal degree in co-relation 37847. Up to 3891 conditions per place. [2024-06-03 20:52:48,980 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 449 selfloop transitions, 159 changer transitions 0/614 dead transitions. [2024-06-03 20:52:48,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 614 transitions, 12325 flow [2024-06-03 20:52:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:52:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:52:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-03 20:52:48,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587583148558758 [2024-06-03 20:52:48,981 INFO L175 Difference]: Start difference. First operand has 478 places, 567 transitions, 10411 flow. Second operand 11 states and 252 transitions. [2024-06-03 20:52:48,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 614 transitions, 12325 flow [2024-06-03 20:52:53,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 614 transitions, 11994 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 20:52:53,623 INFO L231 Difference]: Finished difference. Result has 481 places, 569 transitions, 10448 flow [2024-06-03 20:52:53,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10080, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10448, PETRI_PLACES=481, PETRI_TRANSITIONS=569} [2024-06-03 20:52:53,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-03 20:52:53,624 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 569 transitions, 10448 flow [2024-06-03 20:52:53,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:53,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:53,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:53,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:52:53,624 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 20:52:53,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:53,624 INFO L85 PathProgramCache]: Analyzing trace with hash 447568594, now seen corresponding path program 7 times [2024-06-03 20:52:53,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:53,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589403491] [2024-06-03 20:52:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:53,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:53,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:53,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589403491] [2024-06-03 20:52:53,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589403491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:53,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:53,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:53,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133409781] [2024-06-03 20:52:53,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:53,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:53,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:53,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:53,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:53,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:52:53,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 569 transitions, 10448 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:53,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:53,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:52:53,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:55,170 INFO L124 PetriNetUnfolderBase]: 3117/5223 cut-off events. [2024-06-03 20:52:55,170 INFO L125 PetriNetUnfolderBase]: For 541675/541678 co-relation queries the response was YES. [2024-06-03 20:52:55,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37020 conditions, 5223 events. 3117/5223 cut-off events. For 541675/541678 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 34527 event pairs, 520 based on Foata normal form. 8/5229 useless extension candidates. Maximal degree in co-relation 36815. Up to 4510 conditions per place. [2024-06-03 20:52:55,256 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 535 selfloop transitions, 61 changer transitions 0/602 dead transitions. [2024-06-03 20:52:55,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 602 transitions, 11732 flow [2024-06-03 20:52:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:52:55,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:52:55,257 INFO L175 Difference]: Start difference. First operand has 481 places, 569 transitions, 10448 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:52:55,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 602 transitions, 11732 flow [2024-06-03 20:52:58,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 602 transitions, 11564 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:52:58,828 INFO L231 Difference]: Finished difference. Result has 481 places, 569 transitions, 10408 flow [2024-06-03 20:52:58,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10280, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10408, PETRI_PLACES=481, PETRI_TRANSITIONS=569} [2024-06-03 20:52:58,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-03 20:52:58,828 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 569 transitions, 10408 flow [2024-06-03 20:52:58,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:58,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:58,828 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, 1] [2024-06-03 20:52:58,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:52:58,829 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 20:52:58,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:58,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2085593782, now seen corresponding path program 8 times [2024-06-03 20:52:58,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:58,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620845510] [2024-06-03 20:52:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:58,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:59,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620845510] [2024-06-03 20:52:59,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620845510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:59,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:59,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:59,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787026945] [2024-06-03 20:52:59,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:59,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:59,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:59,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:59,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:59,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:52:59,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 569 transitions, 10408 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:59,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:59,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:52:59,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:00,396 INFO L124 PetriNetUnfolderBase]: 3191/5340 cut-off events. [2024-06-03 20:53:00,396 INFO L125 PetriNetUnfolderBase]: For 631250/631250 co-relation queries the response was YES. [2024-06-03 20:53:00,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38603 conditions, 5340 events. 3191/5340 cut-off events. For 631250/631250 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 35424 event pairs, 669 based on Foata normal form. 8/5344 useless extension candidates. Maximal degree in co-relation 38397. Up to 4412 conditions per place. [2024-06-03 20:53:00,473 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 460 selfloop transitions, 145 changer transitions 0/611 dead transitions. [2024-06-03 20:53:00,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 611 transitions, 12042 flow [2024-06-03 20:53:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:53:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:53:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-03 20:53:00,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-03 20:53:00,474 INFO L175 Difference]: Start difference. First operand has 481 places, 569 transitions, 10408 flow. Second operand 12 states and 260 transitions. [2024-06-03 20:53:00,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 611 transitions, 12042 flow [2024-06-03 20:53:05,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 611 transitions, 11926 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:53:05,133 INFO L231 Difference]: Finished difference. Result has 487 places, 571 transitions, 10622 flow [2024-06-03 20:53:05,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10294, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10622, PETRI_PLACES=487, PETRI_TRANSITIONS=571} [2024-06-03 20:53:05,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-03 20:53:05,133 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 571 transitions, 10622 flow [2024-06-03 20:53:05,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:05,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:05,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:05,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:53:05,134 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 20:53:05,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:05,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1065763120, now seen corresponding path program 9 times [2024-06-03 20:53:05,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:05,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400854035] [2024-06-03 20:53:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:05,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:05,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:05,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400854035] [2024-06-03 20:53:05,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400854035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:05,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:05,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:05,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834999420] [2024-06-03 20:53:05,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:05,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:05,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:05,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:05,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:53:05,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 571 transitions, 10622 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:05,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:05,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:53:05,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:06,858 INFO L124 PetriNetUnfolderBase]: 3265/5450 cut-off events. [2024-06-03 20:53:06,858 INFO L125 PetriNetUnfolderBase]: For 700926/700926 co-relation queries the response was YES. [2024-06-03 20:53:06,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40531 conditions, 5450 events. 3265/5450 cut-off events. For 700926/700926 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36203 event pairs, 695 based on Foata normal form. 8/5454 useless extension candidates. Maximal degree in co-relation 40324. Up to 4530 conditions per place. [2024-06-03 20:53:06,935 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 454 selfloop transitions, 156 changer transitions 0/616 dead transitions. [2024-06-03 20:53:06,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 616 transitions, 12278 flow [2024-06-03 20:53:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:53:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:53:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 265 transitions. [2024-06-03 20:53:06,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386178861788617 [2024-06-03 20:53:06,937 INFO L175 Difference]: Start difference. First operand has 487 places, 571 transitions, 10622 flow. Second operand 12 states and 265 transitions. [2024-06-03 20:53:06,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 616 transitions, 12278 flow [2024-06-03 20:53:12,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 616 transitions, 12042 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 20:53:12,516 INFO L231 Difference]: Finished difference. Result has 489 places, 573 transitions, 10740 flow [2024-06-03 20:53:12,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10386, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10740, PETRI_PLACES=489, PETRI_TRANSITIONS=573} [2024-06-03 20:53:12,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-03 20:53:12,517 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 573 transitions, 10740 flow [2024-06-03 20:53:12,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:12,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:12,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:12,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:53:12,518 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 20:53:12,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:12,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1836647960, now seen corresponding path program 10 times [2024-06-03 20:53:12,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:12,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333770536] [2024-06-03 20:53:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:12,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:12,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:12,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333770536] [2024-06-03 20:53:12,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333770536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:12,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:12,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:12,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650164317] [2024-06-03 20:53:12,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:12,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:12,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:12,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:12,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:12,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:53:12,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 573 transitions, 10740 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:12,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:12,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:53:12,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:14,190 INFO L124 PetriNetUnfolderBase]: 3293/5498 cut-off events. [2024-06-03 20:53:14,191 INFO L125 PetriNetUnfolderBase]: For 711672/711672 co-relation queries the response was YES. [2024-06-03 20:53:14,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41178 conditions, 5498 events. 3293/5498 cut-off events. For 711672/711672 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 36610 event pairs, 717 based on Foata normal form. 8/5502 useless extension candidates. Maximal degree in co-relation 40970. Up to 4736 conditions per place. [2024-06-03 20:53:14,267 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 449 selfloop transitions, 154 changer transitions 0/609 dead transitions. [2024-06-03 20:53:14,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 609 transitions, 12070 flow [2024-06-03 20:53:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:53:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:53:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-03 20:53:14,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 20:53:14,268 INFO L175 Difference]: Start difference. First operand has 489 places, 573 transitions, 10740 flow. Second operand 12 states and 258 transitions. [2024-06-03 20:53:14,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 609 transitions, 12070 flow [2024-06-03 20:53:19,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 609 transitions, 11884 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 20:53:19,009 INFO L231 Difference]: Finished difference. Result has 493 places, 574 transitions, 10889 flow [2024-06-03 20:53:19,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10558, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10889, PETRI_PLACES=493, PETRI_TRANSITIONS=574} [2024-06-03 20:53:19,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-03 20:53:19,010 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 574 transitions, 10889 flow [2024-06-03 20:53:19,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:19,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:19,010 INFO L208 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 20:53:19,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 20:53:19,010 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 20:53:19,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1951939130, now seen corresponding path program 11 times [2024-06-03 20:53:19,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:19,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073968365] [2024-06-03 20:53:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:19,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:19,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:19,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073968365] [2024-06-03 20:53:19,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073968365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:19,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:19,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:19,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652284] [2024-06-03 20:53:19,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:19,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:19,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:19,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:19,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:53:19,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 574 transitions, 10889 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:19,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:19,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:53:19,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:20,654 INFO L124 PetriNetUnfolderBase]: 3275/5473 cut-off events. [2024-06-03 20:53:20,654 INFO L125 PetriNetUnfolderBase]: For 652757/652760 co-relation queries the response was YES. [2024-06-03 20:53:20,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40299 conditions, 5473 events. 3275/5473 cut-off events. For 652757/652760 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 36498 event pairs, 696 based on Foata normal form. 10/5481 useless extension candidates. Maximal degree in co-relation 40089. Up to 4778 conditions per place. [2024-06-03 20:53:20,730 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 536 selfloop transitions, 65 changer transitions 0/607 dead transitions. [2024-06-03 20:53:20,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 607 transitions, 12193 flow [2024-06-03 20:53:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:53:20,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:53:20,731 INFO L175 Difference]: Start difference. First operand has 493 places, 574 transitions, 10889 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:53:20,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 607 transitions, 12193 flow [2024-06-03 20:53:25,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 607 transitions, 11880 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 20:53:25,552 INFO L231 Difference]: Finished difference. Result has 490 places, 574 transitions, 10716 flow [2024-06-03 20:53:25,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10576, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10716, PETRI_PLACES=490, PETRI_TRANSITIONS=574} [2024-06-03 20:53:25,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-03 20:53:25,553 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 574 transitions, 10716 flow [2024-06-03 20:53:25,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:25,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:25,553 INFO L208 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 20:53:25,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 20:53:25,553 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 20:53:25,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:25,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1932613884, now seen corresponding path program 12 times [2024-06-03 20:53:25,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:25,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699512688] [2024-06-03 20:53:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:25,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:25,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:25,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699512688] [2024-06-03 20:53:25,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699512688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:25,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:25,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:25,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235109731] [2024-06-03 20:53:25,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:25,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:25,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:25,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:25,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:25,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:53:25,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 574 transitions, 10716 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:25,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:25,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:53:25,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:27,221 INFO L124 PetriNetUnfolderBase]: 3303/5516 cut-off events. [2024-06-03 20:53:27,221 INFO L125 PetriNetUnfolderBase]: For 660651/660651 co-relation queries the response was YES. [2024-06-03 20:53:27,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40363 conditions, 5516 events. 3303/5516 cut-off events. For 660651/660651 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 36778 event pairs, 713 based on Foata normal form. 8/5520 useless extension candidates. Maximal degree in co-relation 40152. Up to 4754 conditions per place. [2024-06-03 20:53:27,303 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 458 selfloop transitions, 143 changer transitions 0/607 dead transitions. [2024-06-03 20:53:27,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 607 transitions, 12030 flow [2024-06-03 20:53:27,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:53:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:53:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-03 20:53:27,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142276422764228 [2024-06-03 20:53:27,304 INFO L175 Difference]: Start difference. First operand has 490 places, 574 transitions, 10716 flow. Second operand 12 states and 253 transitions. [2024-06-03 20:53:27,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 607 transitions, 12030 flow [2024-06-03 20:53:33,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 607 transitions, 11907 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 20:53:33,066 INFO L231 Difference]: Finished difference. Result has 497 places, 575 transitions, 10902 flow [2024-06-03 20:53:33,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10593, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10902, PETRI_PLACES=497, PETRI_TRANSITIONS=575} [2024-06-03 20:53:33,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-03 20:53:33,066 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 575 transitions, 10902 flow [2024-06-03 20:53:33,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:33,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:33,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:33,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 20:53:33,067 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 20:53:33,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:33,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2075466082, now seen corresponding path program 13 times [2024-06-03 20:53:33,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:33,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334342517] [2024-06-03 20:53:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:33,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:33,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:33,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334342517] [2024-06-03 20:53:33,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334342517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:33,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:33,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:33,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967802719] [2024-06-03 20:53:33,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:33,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:33,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:33,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:33,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:33,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:53:33,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 575 transitions, 10902 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:33,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:33,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:53:33,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:34,743 INFO L124 PetriNetUnfolderBase]: 3331/5556 cut-off events. [2024-06-03 20:53:34,743 INFO L125 PetriNetUnfolderBase]: For 672082/672082 co-relation queries the response was YES. [2024-06-03 20:53:34,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40886 conditions, 5556 events. 3331/5556 cut-off events. For 672082/672082 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 37031 event pairs, 715 based on Foata normal form. 8/5560 useless extension candidates. Maximal degree in co-relation 40673. Up to 4798 conditions per place. [2024-06-03 20:53:34,822 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 463 selfloop transitions, 135 changer transitions 0/604 dead transitions. [2024-06-03 20:53:34,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 604 transitions, 12202 flow [2024-06-03 20:53:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:53:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:53:34,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-03 20:53:34,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-06-03 20:53:34,823 INFO L175 Difference]: Start difference. First operand has 497 places, 575 transitions, 10902 flow. Second operand 11 states and 234 transitions. [2024-06-03 20:53:34,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 604 transitions, 12202 flow [2024-06-03 20:53:40,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 604 transitions, 11932 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:53:40,214 INFO L231 Difference]: Finished difference. Result has 499 places, 576 transitions, 10927 flow [2024-06-03 20:53:40,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10632, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10927, PETRI_PLACES=499, PETRI_TRANSITIONS=576} [2024-06-03 20:53:40,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-03 20:53:40,215 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 576 transitions, 10927 flow [2024-06-03 20:53:40,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:40,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:40,215 INFO L208 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 20:53:40,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 20:53:40,215 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 20:53:40,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:40,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1498560188, now seen corresponding path program 14 times [2024-06-03 20:53:40,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:40,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818714367] [2024-06-03 20:53:40,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:40,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:40,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:40,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818714367] [2024-06-03 20:53:40,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818714367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:40,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:40,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:40,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721568383] [2024-06-03 20:53:40,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:40,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:40,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:40,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:40,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:40,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:53:40,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 576 transitions, 10927 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:40,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:40,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:53:40,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:42,007 INFO L124 PetriNetUnfolderBase]: 3313/5535 cut-off events. [2024-06-03 20:53:42,008 INFO L125 PetriNetUnfolderBase]: For 609889/609892 co-relation queries the response was YES. [2024-06-03 20:53:42,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39744 conditions, 5535 events. 3313/5535 cut-off events. For 609889/609892 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 37020 event pairs, 696 based on Foata normal form. 10/5543 useless extension candidates. Maximal degree in co-relation 39530. Up to 4758 conditions per place. [2024-06-03 20:53:42,099 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 512 selfloop transitions, 88 changer transitions 0/606 dead transitions. [2024-06-03 20:53:42,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 606 transitions, 12221 flow [2024-06-03 20:53:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:42,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:53:42,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:53:42,100 INFO L175 Difference]: Start difference. First operand has 499 places, 576 transitions, 10927 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:53:42,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 606 transitions, 12221 flow [2024-06-03 20:53:46,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 606 transitions, 11927 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-03 20:53:46,597 INFO L231 Difference]: Finished difference. Result has 496 places, 576 transitions, 10819 flow [2024-06-03 20:53:46,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10633, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10819, PETRI_PLACES=496, PETRI_TRANSITIONS=576} [2024-06-03 20:53:46,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-03 20:53:46,597 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 576 transitions, 10819 flow [2024-06-03 20:53:46,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:46,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:46,598 INFO L208 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 20:53:46,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 20:53:46,598 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 20:53:46,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:46,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2130852126, now seen corresponding path program 1 times [2024-06-03 20:53:46,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:46,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133560531] [2024-06-03 20:53:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:46,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:46,887 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 20:53:46,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:46,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133560531] [2024-06-03 20:53:46,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133560531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:46,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:46,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:46,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830442126] [2024-06-03 20:53:46,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:46,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:46,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:46,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:46,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:46,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:53:46,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 576 transitions, 10819 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:46,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:46,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:53:46,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:48,269 INFO L124 PetriNetUnfolderBase]: 3366/5617 cut-off events. [2024-06-03 20:53:48,269 INFO L125 PetriNetUnfolderBase]: For 655914/655914 co-relation queries the response was YES. [2024-06-03 20:53:48,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41000 conditions, 5617 events. 3366/5617 cut-off events. For 655914/655914 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 37531 event pairs, 694 based on Foata normal form. 6/5615 useless extension candidates. Maximal degree in co-relation 40785. Up to 3943 conditions per place. [2024-06-03 20:53:48,350 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 453 selfloop transitions, 160 changer transitions 0/619 dead transitions. [2024-06-03 20:53:48,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 619 transitions, 12499 flow [2024-06-03 20:53:48,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:53:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:53:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-03 20:53:48,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432372505543237 [2024-06-03 20:53:48,351 INFO L175 Difference]: Start difference. First operand has 496 places, 576 transitions, 10819 flow. Second operand 11 states and 245 transitions. [2024-06-03 20:53:48,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 619 transitions, 12499 flow [2024-06-03 20:53:53,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 619 transitions, 12330 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:53:53,664 INFO L231 Difference]: Finished difference. Result has 502 places, 578 transitions, 11024 flow [2024-06-03 20:53:53,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10650, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11024, PETRI_PLACES=502, PETRI_TRANSITIONS=578} [2024-06-03 20:53:53,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-03 20:53:53,664 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 578 transitions, 11024 flow [2024-06-03 20:53:53,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:53,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:53,665 INFO L208 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 20:53:53,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 20:53:53,665 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 20:53:53,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:53,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2131150656, now seen corresponding path program 2 times [2024-06-03 20:53:53,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:53,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346581947] [2024-06-03 20:53:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:53,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:53,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:53,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346581947] [2024-06-03 20:53:53,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346581947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:53,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:53,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:53,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78383241] [2024-06-03 20:53:53,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:53,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:53,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:53,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:53,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:54,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:53:54,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 578 transitions, 11024 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:54,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:54,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:53:54,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:55,350 INFO L124 PetriNetUnfolderBase]: 3386/5648 cut-off events. [2024-06-03 20:53:55,351 INFO L125 PetriNetUnfolderBase]: For 667704/667704 co-relation queries the response was YES. [2024-06-03 20:53:55,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41676 conditions, 5648 events. 3386/5648 cut-off events. For 667704/667704 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 37830 event pairs, 666 based on Foata normal form. 6/5646 useless extension candidates. Maximal degree in co-relation 41460. Up to 3955 conditions per place. [2024-06-03 20:53:55,438 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 455 selfloop transitions, 157 changer transitions 0/618 dead transitions. [2024-06-03 20:53:55,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 618 transitions, 12686 flow [2024-06-03 20:53:55,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:53:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:53:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-03 20:53:55,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388026607538803 [2024-06-03 20:53:55,439 INFO L175 Difference]: Start difference. First operand has 502 places, 578 transitions, 11024 flow. Second operand 11 states and 243 transitions. [2024-06-03 20:53:55,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 618 transitions, 12686 flow [2024-06-03 20:54:00,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 618 transitions, 12406 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-03 20:54:00,819 INFO L231 Difference]: Finished difference. Result has 505 places, 579 transitions, 11089 flow [2024-06-03 20:54:00,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10756, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11089, PETRI_PLACES=505, PETRI_TRANSITIONS=579} [2024-06-03 20:54:00,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-03 20:54:00,819 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 579 transitions, 11089 flow [2024-06-03 20:54:00,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:00,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:00,819 INFO L208 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 20:54:00,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 20:54:00,820 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 20:54:00,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:00,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2131151028, now seen corresponding path program 1 times [2024-06-03 20:54:00,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:00,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831456398] [2024-06-03 20:54:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:00,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:01,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:01,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831456398] [2024-06-03 20:54:01,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831456398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:01,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:01,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:54:01,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661371054] [2024-06-03 20:54:01,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:01,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:54:01,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:01,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:54:01,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:54:01,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:54:01,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 579 transitions, 11089 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:01,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:01,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:54:01,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:02,691 INFO L124 PetriNetUnfolderBase]: 3647/6103 cut-off events. [2024-06-03 20:54:02,691 INFO L125 PetriNetUnfolderBase]: For 1225635/1225635 co-relation queries the response was YES. [2024-06-03 20:54:02,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48974 conditions, 6103 events. 3647/6103 cut-off events. For 1225635/1225635 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41431 event pairs, 810 based on Foata normal form. 30/6129 useless extension candidates. Maximal degree in co-relation 48756. Up to 4201 conditions per place. [2024-06-03 20:54:02,782 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 296 changer transitions 7/630 dead transitions. [2024-06-03 20:54:02,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 630 transitions, 12899 flow [2024-06-03 20:54:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:54:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:54:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 291 transitions. [2024-06-03 20:54:02,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459662288930581 [2024-06-03 20:54:02,783 INFO L175 Difference]: Start difference. First operand has 505 places, 579 transitions, 11089 flow. Second operand 13 states and 291 transitions. [2024-06-03 20:54:02,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 630 transitions, 12899 flow [2024-06-03 20:54:10,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 630 transitions, 12634 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:54:10,532 INFO L231 Difference]: Finished difference. Result has 510 places, 580 transitions, 11478 flow [2024-06-03 20:54:10,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11478, PETRI_PLACES=510, PETRI_TRANSITIONS=580} [2024-06-03 20:54:10,532 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-03 20:54:10,532 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 580 transitions, 11478 flow [2024-06-03 20:54:10,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:10,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:10,532 INFO L208 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 20:54:10,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 20:54:10,532 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 20:54:10,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:10,533 INFO L85 PathProgramCache]: Analyzing trace with hash 101650018, now seen corresponding path program 3 times [2024-06-03 20:54:10,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:10,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309044885] [2024-06-03 20:54:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:10,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:10,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:10,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309044885] [2024-06-03 20:54:10,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309044885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:10,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:10,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:10,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699469921] [2024-06-03 20:54:10,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:10,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:10,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:10,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:10,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:10,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:54:10,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 580 transitions, 11478 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:10,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:10,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:54:10,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:12,289 INFO L124 PetriNetUnfolderBase]: 3617/6068 cut-off events. [2024-06-03 20:54:12,289 INFO L125 PetriNetUnfolderBase]: For 1018606/1018606 co-relation queries the response was YES. [2024-06-03 20:54:12,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48990 conditions, 6068 events. 3617/6068 cut-off events. For 1018606/1018606 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 41246 event pairs, 881 based on Foata normal form. 6/6066 useless extension candidates. Maximal degree in co-relation 48771. Up to 5130 conditions per place. [2024-06-03 20:54:12,386 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 467 selfloop transitions, 139 changer transitions 0/612 dead transitions. [2024-06-03 20:54:12,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 612 transitions, 12807 flow [2024-06-03 20:54:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:54:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:54:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:54:12,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-03 20:54:12,387 INFO L175 Difference]: Start difference. First operand has 510 places, 580 transitions, 11478 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:54:12,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 612 transitions, 12807 flow [2024-06-03 20:54:20,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 612 transitions, 12180 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-06-03 20:54:20,571 INFO L231 Difference]: Finished difference. Result has 510 places, 581 transitions, 11151 flow [2024-06-03 20:54:20,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10851, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11151, PETRI_PLACES=510, PETRI_TRANSITIONS=581} [2024-06-03 20:54:20,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-03 20:54:20,571 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 581 transitions, 11151 flow [2024-06-03 20:54:20,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:20,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:20,572 INFO L208 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 20:54:20,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 20:54:20,572 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 20:54:20,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2075250508, now seen corresponding path program 2 times [2024-06-03 20:54:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:20,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039003299] [2024-06-03 20:54:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:20,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:20,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:20,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039003299] [2024-06-03 20:54:20,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039003299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:20,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:20,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:54:20,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399053728] [2024-06-03 20:54:20,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:20,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:54:20,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:20,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:54:20,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:54:20,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:54:20,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 581 transitions, 11151 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:20,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:20,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:54:20,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:22,430 INFO L124 PetriNetUnfolderBase]: 3878/6505 cut-off events. [2024-06-03 20:54:22,431 INFO L125 PetriNetUnfolderBase]: For 1585746/1585746 co-relation queries the response was YES. [2024-06-03 20:54:22,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55245 conditions, 6505 events. 3878/6505 cut-off events. For 1585746/1585746 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 44678 event pairs, 974 based on Foata normal form. 30/6531 useless extension candidates. Maximal degree in co-relation 55026. Up to 4944 conditions per place. [2024-06-03 20:54:22,544 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 325 selfloop transitions, 290 changer transitions 4/625 dead transitions. [2024-06-03 20:54:22,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 625 transitions, 12895 flow [2024-06-03 20:54:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:54:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:54:22,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 285 transitions. [2024-06-03 20:54:22,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347091932457786 [2024-06-03 20:54:22,545 INFO L175 Difference]: Start difference. First operand has 510 places, 581 transitions, 11151 flow. Second operand 13 states and 285 transitions. [2024-06-03 20:54:22,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 625 transitions, 12895 flow [2024-06-03 20:54:33,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 625 transitions, 12599 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 20:54:33,891 INFO L231 Difference]: Finished difference. Result has 513 places, 582 transitions, 11476 flow [2024-06-03 20:54:33,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10855, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11476, PETRI_PLACES=513, PETRI_TRANSITIONS=582} [2024-06-03 20:54:33,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-03 20:54:33,891 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 582 transitions, 11476 flow [2024-06-03 20:54:33,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:33,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:33,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:33,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 20:54:33,892 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 20:54:33,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:33,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2075102638, now seen corresponding path program 3 times [2024-06-03 20:54:33,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:33,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748074782] [2024-06-03 20:54:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:33,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:34,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:34,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748074782] [2024-06-03 20:54:34,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748074782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:34,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:34,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:54:34,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697658820] [2024-06-03 20:54:34,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:34,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:54:34,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:34,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:54:34,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:54:34,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:54:34,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 582 transitions, 11476 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:34,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:34,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:54:34,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:36,061 INFO L124 PetriNetUnfolderBase]: 3779/6354 cut-off events. [2024-06-03 20:54:36,061 INFO L125 PetriNetUnfolderBase]: For 1318656/1318656 co-relation queries the response was YES. [2024-06-03 20:54:36,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50174 conditions, 6354 events. 3779/6354 cut-off events. For 1318656/1318656 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 43673 event pairs, 975 based on Foata normal form. 34/6384 useless extension candidates. Maximal degree in co-relation 49954. Up to 5084 conditions per place. [2024-06-03 20:54:36,172 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 287 changer transitions 3/617 dead transitions. [2024-06-03 20:54:36,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 617 transitions, 12812 flow [2024-06-03 20:54:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:54:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:54:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 278 transitions. [2024-06-03 20:54:36,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215759849906192 [2024-06-03 20:54:36,173 INFO L175 Difference]: Start difference. First operand has 513 places, 582 transitions, 11476 flow. Second operand 13 states and 278 transitions. [2024-06-03 20:54:36,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 617 transitions, 12812 flow [2024-06-03 20:54:44,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 617 transitions, 12596 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-03 20:54:44,901 INFO L231 Difference]: Finished difference. Result has 518 places, 581 transitions, 11826 flow [2024-06-03 20:54:44,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11260, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11826, PETRI_PLACES=518, PETRI_TRANSITIONS=581} [2024-06-03 20:54:44,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-03 20:54:44,902 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 581 transitions, 11826 flow [2024-06-03 20:54:44,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:44,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:44,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:44,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 20:54:44,902 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 20:54:44,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:44,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1504286012, now seen corresponding path program 4 times [2024-06-03 20:54:44,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:44,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643379183] [2024-06-03 20:54:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:44,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:45,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:45,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643379183] [2024-06-03 20:54:45,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643379183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:45,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:45,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:54:45,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567342872] [2024-06-03 20:54:45,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:45,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:54:45,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:45,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:54:45,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:54:45,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:54:45,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 581 transitions, 11826 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:45,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:45,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:54:45,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:47,172 INFO L124 PetriNetUnfolderBase]: 3873/6509 cut-off events. [2024-06-03 20:54:47,172 INFO L125 PetriNetUnfolderBase]: For 1339005/1339008 co-relation queries the response was YES. [2024-06-03 20:54:47,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51404 conditions, 6509 events. 3873/6509 cut-off events. For 1339005/1339008 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 44979 event pairs, 1016 based on Foata normal form. 36/6543 useless extension candidates. Maximal degree in co-relation 51182. Up to 5554 conditions per place. [2024-06-03 20:54:47,271 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 473 selfloop transitions, 131 changer transitions 4/614 dead transitions. [2024-06-03 20:54:47,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 614 transitions, 13186 flow [2024-06-03 20:54:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:54:47,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:54:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 20:54:47,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:54:47,272 INFO L175 Difference]: Start difference. First operand has 518 places, 581 transitions, 11826 flow. Second operand 10 states and 225 transitions. [2024-06-03 20:54:47,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 614 transitions, 13186 flow [2024-06-03 20:54:56,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 614 transitions, 12603 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-03 20:54:56,778 INFO L231 Difference]: Finished difference. Result has 516 places, 580 transitions, 11518 flow [2024-06-03 20:54:56,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11243, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11518, PETRI_PLACES=516, PETRI_TRANSITIONS=580} [2024-06-03 20:54:56,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-03 20:54:56,778 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 580 transitions, 11518 flow [2024-06-03 20:54:56,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:56,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:56,778 INFO L208 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 20:54:56,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 20:54:56,778 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 20:54:56,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:56,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1653737298, now seen corresponding path program 5 times [2024-06-03 20:54:56,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:56,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513607615] [2024-06-03 20:54:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:56,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:57,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:57,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513607615] [2024-06-03 20:54:57,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513607615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:57,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:57,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:54:57,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167510957] [2024-06-03 20:54:57,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:57,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:54:57,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:57,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:54:57,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:54:57,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:54:57,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 580 transitions, 11518 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:57,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:57,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:54:57,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:59,070 INFO L124 PetriNetUnfolderBase]: 3965/6685 cut-off events. [2024-06-03 20:54:59,070 INFO L125 PetriNetUnfolderBase]: For 1354136/1354139 co-relation queries the response was YES. [2024-06-03 20:54:59,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52008 conditions, 6685 events. 3965/6685 cut-off events. For 1354136/1354139 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 46517 event pairs, 1070 based on Foata normal form. 36/6719 useless extension candidates. Maximal degree in co-relation 51785. Up to 5710 conditions per place. [2024-06-03 20:54:59,178 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 475 selfloop transitions, 126 changer transitions 4/611 dead transitions. [2024-06-03 20:54:59,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 611 transitions, 12870 flow [2024-06-03 20:54:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:54:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:54:59,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 20:54:59,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-03 20:54:59,179 INFO L175 Difference]: Start difference. First operand has 516 places, 580 transitions, 11518 flow. Second operand 8 states and 189 transitions. [2024-06-03 20:54:59,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 611 transitions, 12870 flow [2024-06-03 20:55:08,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 611 transitions, 12583 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 20:55:08,736 INFO L231 Difference]: Finished difference. Result has 516 places, 579 transitions, 11498 flow [2024-06-03 20:55:08,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11231, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11498, PETRI_PLACES=516, PETRI_TRANSITIONS=579} [2024-06-03 20:55:08,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-03 20:55:08,736 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 579 transitions, 11498 flow [2024-06-03 20:55:08,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:08,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:08,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:08,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 20:55:08,737 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 20:55:08,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:08,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1498775762, now seen corresponding path program 6 times [2024-06-03 20:55:08,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:08,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314103884] [2024-06-03 20:55:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:08,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:09,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:09,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314103884] [2024-06-03 20:55:09,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314103884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:09,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:09,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:55:09,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695518601] [2024-06-03 20:55:09,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:09,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:55:09,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:09,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:55:09,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:55:09,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:55:09,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 579 transitions, 11498 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:09,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:09,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:55:09,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:11,079 INFO L124 PetriNetUnfolderBase]: 4041/6810 cut-off events. [2024-06-03 20:55:11,079 INFO L125 PetriNetUnfolderBase]: For 1333231/1333234 co-relation queries the response was YES. [2024-06-03 20:55:11,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52562 conditions, 6810 events. 4041/6810 cut-off events. For 1333231/1333234 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 47389 event pairs, 1023 based on Foata normal form. 32/6840 useless extension candidates. Maximal degree in co-relation 52338. Up to 5087 conditions per place. [2024-06-03 20:55:11,183 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 479 selfloop transitions, 129 changer transitions 6/620 dead transitions. [2024-06-03 20:55:11,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 620 transitions, 13210 flow [2024-06-03 20:55:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 20:55:11,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-03 20:55:11,184 INFO L175 Difference]: Start difference. First operand has 516 places, 579 transitions, 11498 flow. Second operand 8 states and 198 transitions. [2024-06-03 20:55:11,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 620 transitions, 13210 flow [2024-06-03 20:55:19,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 620 transitions, 12931 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:55:19,550 INFO L231 Difference]: Finished difference. Result has 518 places, 577 transitions, 11401 flow [2024-06-03 20:55:19,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11219, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11401, PETRI_PLACES=518, PETRI_TRANSITIONS=577} [2024-06-03 20:55:19,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-03 20:55:19,550 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 577 transitions, 11401 flow [2024-06-03 20:55:19,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:19,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:19,551 INFO L208 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 20:55:19,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-03 20:55:19,551 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 20:55:19,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:19,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1879064280, now seen corresponding path program 4 times [2024-06-03 20:55:19,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:19,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481192661] [2024-06-03 20:55:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:19,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:19,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:19,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481192661] [2024-06-03 20:55:19,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481192661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:19,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:19,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:55:19,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032738172] [2024-06-03 20:55:19,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:19,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:55:19,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:19,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:55:19,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:55:19,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:55:19,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 577 transitions, 11401 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:19,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:19,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:55:19,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:21,719 INFO L124 PetriNetUnfolderBase]: 3986/6722 cut-off events. [2024-06-03 20:55:21,719 INFO L125 PetriNetUnfolderBase]: For 1039995/1039998 co-relation queries the response was YES. [2024-06-03 20:55:21,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51146 conditions, 6722 events. 3986/6722 cut-off events. For 1039995/1039998 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 46855 event pairs, 984 based on Foata normal form. 8/6720 useless extension candidates. Maximal degree in co-relation 50921. Up to 5474 conditions per place. [2024-06-03 20:55:21,830 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 512 selfloop transitions, 92 changer transitions 0/610 dead transitions. [2024-06-03 20:55:21,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 610 transitions, 12719 flow [2024-06-03 20:55:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:55:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:55:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:55:21,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-03 20:55:21,831 INFO L175 Difference]: Start difference. First operand has 518 places, 577 transitions, 11401 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:55:21,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 610 transitions, 12719 flow [2024-06-03 20:55:29,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 610 transitions, 12204 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 20:55:29,927 INFO L231 Difference]: Finished difference. Result has 518 places, 577 transitions, 11080 flow [2024-06-03 20:55:29,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10886, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11080, PETRI_PLACES=518, PETRI_TRANSITIONS=577} [2024-06-03 20:55:29,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-03 20:55:29,928 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 577 transitions, 11080 flow [2024-06-03 20:55:29,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:29,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:29,928 INFO L208 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 20:55:29,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-03 20:55:29,928 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 20:55:29,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:29,929 INFO L85 PathProgramCache]: Analyzing trace with hash -402512074, now seen corresponding path program 1 times [2024-06-03 20:55:29,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:29,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59989683] [2024-06-03 20:55:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:29,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:30,250 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 20:55:30,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:30,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59989683] [2024-06-03 20:55:30,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59989683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:30,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:30,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:55:30,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044229086] [2024-06-03 20:55:30,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:30,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:55:30,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:30,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:55:30,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:55:30,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:55:30,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 577 transitions, 11080 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:30,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:30,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:55:30,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:32,180 INFO L124 PetriNetUnfolderBase]: 4074/6898 cut-off events. [2024-06-03 20:55:32,180 INFO L125 PetriNetUnfolderBase]: For 1303387/1303390 co-relation queries the response was YES. [2024-06-03 20:55:32,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51180 conditions, 6898 events. 4074/6898 cut-off events. For 1303387/1303390 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 48345 event pairs, 1095 based on Foata normal form. 32/6928 useless extension candidates. Maximal degree in co-relation 50955. Up to 5565 conditions per place. [2024-06-03 20:55:32,286 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 475 selfloop transitions, 128 changer transitions 7/616 dead transitions. [2024-06-03 20:55:32,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 616 transitions, 12492 flow [2024-06-03 20:55:32,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:55:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:55:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-03 20:55:32,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-03 20:55:32,287 INFO L175 Difference]: Start difference. First operand has 518 places, 577 transitions, 11080 flow. Second operand 10 states and 228 transitions. [2024-06-03 20:55:32,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 616 transitions, 12492 flow [2024-06-03 20:55:39,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 616 transitions, 12249 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:55:39,942 INFO L231 Difference]: Finished difference. Result has 520 places, 576 transitions, 11102 flow [2024-06-03 20:55:39,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10837, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11102, PETRI_PLACES=520, PETRI_TRANSITIONS=576} [2024-06-03 20:55:39,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 478 predicate places. [2024-06-03 20:55:39,943 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 576 transitions, 11102 flow [2024-06-03 20:55:39,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:39,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:39,943 INFO L208 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 20:55:39,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-03 20:55:39,943 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 20:55:39,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:39,944 INFO L85 PathProgramCache]: Analyzing trace with hash 420004882, now seen corresponding path program 7 times [2024-06-03 20:55:39,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:39,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83505109] [2024-06-03 20:55:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:39,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:40,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:40,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83505109] [2024-06-03 20:55:40,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83505109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:40,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:40,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:55:40,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370118347] [2024-06-03 20:55:40,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:40,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:55:40,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:40,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:55:40,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:55:40,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:55:40,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 576 transitions, 11102 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:40,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:40,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:55:40,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:42,247 INFO L124 PetriNetUnfolderBase]: 4146/7020 cut-off events. [2024-06-03 20:55:42,248 INFO L125 PetriNetUnfolderBase]: For 1350422/1350425 co-relation queries the response was YES. [2024-06-03 20:55:42,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51782 conditions, 7020 events. 4146/7020 cut-off events. For 1350422/1350425 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 49473 event pairs, 1185 based on Foata normal form. 36/7054 useless extension candidates. Maximal degree in co-relation 51557. Up to 5911 conditions per place. [2024-06-03 20:55:42,362 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 427 selfloop transitions, 170 changer transitions 3/606 dead transitions. [2024-06-03 20:55:42,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 606 transitions, 12440 flow [2024-06-03 20:55:42,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:55:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:55:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-03 20:55:42,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-03 20:55:42,376 INFO L175 Difference]: Start difference. First operand has 520 places, 576 transitions, 11102 flow. Second operand 10 states and 221 transitions. [2024-06-03 20:55:42,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 606 transitions, 12440 flow [2024-06-03 20:55:50,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 606 transitions, 12144 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-03 20:55:50,397 INFO L231 Difference]: Finished difference. Result has 522 places, 576 transitions, 11179 flow [2024-06-03 20:55:50,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10806, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11179, PETRI_PLACES=522, PETRI_TRANSITIONS=576} [2024-06-03 20:55:50,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-03 20:55:50,398 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 576 transitions, 11179 flow [2024-06-03 20:55:50,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:50,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:50,398 INFO L208 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 20:55:50,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-03 20:55:50,398 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 20:55:50,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:50,399 INFO L85 PathProgramCache]: Analyzing trace with hash 871060120, now seen corresponding path program 2 times [2024-06-03 20:55:50,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:50,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352722378] [2024-06-03 20:55:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:50,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:50,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:50,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352722378] [2024-06-03 20:55:50,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352722378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:50,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:50,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:55:50,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655944172] [2024-06-03 20:55:50,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:50,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:55:50,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:55:50,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:55:50,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:55:50,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 576 transitions, 11179 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:50,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:50,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:55:50,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:52,760 INFO L124 PetriNetUnfolderBase]: 4224/7174 cut-off events. [2024-06-03 20:55:52,760 INFO L125 PetriNetUnfolderBase]: For 1324025/1324028 co-relation queries the response was YES. [2024-06-03 20:55:52,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52440 conditions, 7174 events. 4224/7174 cut-off events. For 1324025/1324028 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 50842 event pairs, 1185 based on Foata normal form. 32/7204 useless extension candidates. Maximal degree in co-relation 52214. Up to 5865 conditions per place. [2024-06-03 20:55:52,876 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 170 changer transitions 8/613 dead transitions. [2024-06-03 20:55:52,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 613 transitions, 12581 flow [2024-06-03 20:55:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:55:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:55:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-03 20:55:52,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:55:52,877 INFO L175 Difference]: Start difference. First operand has 522 places, 576 transitions, 11179 flow. Second operand 11 states and 242 transitions. [2024-06-03 20:55:52,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 613 transitions, 12581 flow [2024-06-03 20:56:01,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 613 transitions, 12212 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-03 20:56:01,034 INFO L231 Difference]: Finished difference. Result has 525 places, 574 transitions, 11157 flow [2024-06-03 20:56:01,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10810, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11157, PETRI_PLACES=525, PETRI_TRANSITIONS=574} [2024-06-03 20:56:01,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-03 20:56:01,035 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 574 transitions, 11157 flow [2024-06-03 20:56:01,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:01,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:01,035 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] [2024-06-03 20:56:01,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-03 20:56:01,035 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 20:56:01,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:01,035 INFO L85 PathProgramCache]: Analyzing trace with hash -582180952, now seen corresponding path program 3 times [2024-06-03 20:56:01,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:01,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346600052] [2024-06-03 20:56:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:01,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:01,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:01,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346600052] [2024-06-03 20:56:01,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346600052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:01,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:01,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:56:01,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101774538] [2024-06-03 20:56:01,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:01,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:56:01,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:01,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:56:01,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:56:01,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:56:01,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 574 transitions, 11157 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:01,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:01,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:56:01,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:03,351 INFO L124 PetriNetUnfolderBase]: 4309/7315 cut-off events. [2024-06-03 20:56:03,351 INFO L125 PetriNetUnfolderBase]: For 1711556/1711559 co-relation queries the response was YES. [2024-06-03 20:56:03,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58411 conditions, 7315 events. 4309/7315 cut-off events. For 1711556/1711559 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 51800 event pairs, 1230 based on Foata normal form. 32/7345 useless extension candidates. Maximal degree in co-relation 58184. Up to 4919 conditions per place. [2024-06-03 20:56:03,575 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 432 selfloop transitions, 167 changer transitions 11/616 dead transitions. [2024-06-03 20:56:03,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 616 transitions, 12935 flow [2024-06-03 20:56:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:56:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:56:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-03 20:56:03,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-03 20:56:03,576 INFO L175 Difference]: Start difference. First operand has 525 places, 574 transitions, 11157 flow. Second operand 10 states and 229 transitions. [2024-06-03 20:56:03,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 616 transitions, 12935 flow [2024-06-03 20:56:14,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 616 transitions, 12549 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-03 20:56:14,569 INFO L231 Difference]: Finished difference. Result has 526 places, 570 transitions, 11103 flow [2024-06-03 20:56:14,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10771, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11103, PETRI_PLACES=526, PETRI_TRANSITIONS=570} [2024-06-03 20:56:14,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-03 20:56:14,570 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 570 transitions, 11103 flow [2024-06-03 20:56:14,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:14,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:14,570 INFO L208 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 20:56:14,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-03 20:56:14,570 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 20:56:14,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash -437574754, now seen corresponding path program 15 times [2024-06-03 20:56:14,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:14,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950827534] [2024-06-03 20:56:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:14,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:14,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:14,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950827534] [2024-06-03 20:56:14,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950827534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:14,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:14,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:14,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563326520] [2024-06-03 20:56:14,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:14,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:14,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:14,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:56:14,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 570 transitions, 11103 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:14,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:14,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:56:14,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:16,756 INFO L124 PetriNetUnfolderBase]: 4168/7076 cut-off events. [2024-06-03 20:56:16,756 INFO L125 PetriNetUnfolderBase]: For 1495505/1495508 co-relation queries the response was YES. [2024-06-03 20:56:16,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57366 conditions, 7076 events. 4168/7076 cut-off events. For 1495505/1495508 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 50112 event pairs, 1239 based on Foata normal form. 10/7078 useless extension candidates. Maximal degree in co-relation 57138. Up to 6057 conditions per place. [2024-06-03 20:56:16,863 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 469 selfloop transitions, 133 changer transitions 0/608 dead transitions. [2024-06-03 20:56:16,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 608 transitions, 12749 flow [2024-06-03 20:56:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:56:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:56:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-03 20:56:16,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-03 20:56:16,864 INFO L175 Difference]: Start difference. First operand has 526 places, 570 transitions, 11103 flow. Second operand 12 states and 255 transitions. [2024-06-03 20:56:16,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 608 transitions, 12749 flow [2024-06-03 20:56:24,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 608 transitions, 12367 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-03 20:56:24,892 INFO L231 Difference]: Finished difference. Result has 530 places, 571 transitions, 11011 flow [2024-06-03 20:56:24,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10721, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11011, PETRI_PLACES=530, PETRI_TRANSITIONS=571} [2024-06-03 20:56:24,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-03 20:56:24,893 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 571 transitions, 11011 flow [2024-06-03 20:56:24,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:24,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:24,893 INFO L208 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 20:56:24,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-03 20:56:24,893 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 20:56:24,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:24,893 INFO L85 PathProgramCache]: Analyzing trace with hash -429003874, now seen corresponding path program 16 times [2024-06-03 20:56:24,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:24,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661171692] [2024-06-03 20:56:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:24,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:25,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:25,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661171692] [2024-06-03 20:56:25,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661171692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:25,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:25,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:25,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519480768] [2024-06-03 20:56:25,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:25,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:25,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:25,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:25,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:25,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:56:25,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 571 transitions, 11011 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:25,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:25,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:56:25,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:27,083 INFO L124 PetriNetUnfolderBase]: 4023/6829 cut-off events. [2024-06-03 20:56:27,083 INFO L125 PetriNetUnfolderBase]: For 1131483/1131486 co-relation queries the response was YES. [2024-06-03 20:56:27,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50862 conditions, 6829 events. 4023/6829 cut-off events. For 1131483/1131486 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 47970 event pairs, 1158 based on Foata normal form. 10/6831 useless extension candidates. Maximal degree in co-relation 50633. Up to 5992 conditions per place. [2024-06-03 20:56:27,191 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 464 selfloop transitions, 131 changer transitions 0/601 dead transitions. [2024-06-03 20:56:27,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 601 transitions, 12311 flow [2024-06-03 20:56:27,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:56:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:56:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-03 20:56:27,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-03 20:56:27,192 INFO L175 Difference]: Start difference. First operand has 530 places, 571 transitions, 11011 flow. Second operand 12 states and 248 transitions. [2024-06-03 20:56:27,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 601 transitions, 12311 flow [2024-06-03 20:56:33,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 601 transitions, 11847 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-03 20:56:33,912 INFO L231 Difference]: Finished difference. Result has 531 places, 572 transitions, 10838 flow [2024-06-03 20:56:33,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10555, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10838, PETRI_PLACES=531, PETRI_TRANSITIONS=572} [2024-06-03 20:56:33,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-03 20:56:33,912 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 572 transitions, 10838 flow [2024-06-03 20:56:33,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:33,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:33,912 INFO L208 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 20:56:33,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-03 20:56:33,912 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 20:56:33,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:33,913 INFO L85 PathProgramCache]: Analyzing trace with hash -142116544, now seen corresponding path program 17 times [2024-06-03 20:56:33,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:33,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706292071] [2024-06-03 20:56:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:33,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:34,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:34,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706292071] [2024-06-03 20:56:34,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706292071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:34,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:34,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:34,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900438356] [2024-06-03 20:56:34,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:34,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:34,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:34,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:34,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:34,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:56:34,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 572 transitions, 10838 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:34,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:34,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:56:34,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:36,343 INFO L124 PetriNetUnfolderBase]: 4051/6877 cut-off events. [2024-06-03 20:56:36,343 INFO L125 PetriNetUnfolderBase]: For 1144946/1144949 co-relation queries the response was YES. [2024-06-03 20:56:36,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50346 conditions, 6877 events. 4051/6877 cut-off events. For 1144946/1144949 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 48338 event pairs, 1164 based on Foata normal form. 10/6879 useless extension candidates. Maximal degree in co-relation 50118. Up to 6036 conditions per place. [2024-06-03 20:56:36,463 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 465 selfloop transitions, 127 changer transitions 0/598 dead transitions. [2024-06-03 20:56:36,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 598 transitions, 12116 flow [2024-06-03 20:56:36,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:56:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:56:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-03 20:56:36,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:56:36,464 INFO L175 Difference]: Start difference. First operand has 531 places, 572 transitions, 10838 flow. Second operand 11 states and 231 transitions. [2024-06-03 20:56:36,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 598 transitions, 12116 flow [2024-06-03 20:56:44,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 598 transitions, 11802 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 20:56:44,824 INFO L231 Difference]: Finished difference. Result has 532 places, 573 transitions, 10801 flow [2024-06-03 20:56:44,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10524, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10801, PETRI_PLACES=532, PETRI_TRANSITIONS=573} [2024-06-03 20:56:44,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-03 20:56:44,825 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 573 transitions, 10801 flow [2024-06-03 20:56:44,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:44,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:44,825 INFO L208 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 20:56:44,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-03 20:56:44,825 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 20:56:44,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:44,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1002248512, now seen corresponding path program 18 times [2024-06-03 20:56:44,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:44,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932764192] [2024-06-03 20:56:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:44,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:45,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:45,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932764192] [2024-06-03 20:56:45,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932764192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:45,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:45,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:45,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154553704] [2024-06-03 20:56:45,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:45,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:45,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:45,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:45,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:45,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:56:45,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 573 transitions, 10801 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:45,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:45,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:56:45,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:46,912 INFO L124 PetriNetUnfolderBase]: 4079/6917 cut-off events. [2024-06-03 20:56:46,912 INFO L125 PetriNetUnfolderBase]: For 1159769/1159772 co-relation queries the response was YES. [2024-06-03 20:56:46,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50642 conditions, 6917 events. 4079/6917 cut-off events. For 1159769/1159772 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 48655 event pairs, 1166 based on Foata normal form. 10/6919 useless extension candidates. Maximal degree in co-relation 50413. Up to 6080 conditions per place. [2024-06-03 20:56:47,017 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 465 selfloop transitions, 124 changer transitions 0/595 dead transitions. [2024-06-03 20:56:47,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 595 transitions, 12065 flow [2024-06-03 20:56:47,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:56:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:56:47,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-03 20:56:47,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:56:47,018 INFO L175 Difference]: Start difference. First operand has 532 places, 573 transitions, 10801 flow. Second operand 10 states and 210 transitions. [2024-06-03 20:56:47,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 595 transitions, 12065 flow [2024-06-03 20:56:54,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 595 transitions, 11808 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-03 20:56:54,991 INFO L231 Difference]: Finished difference. Result has 533 places, 574 transitions, 10817 flow [2024-06-03 20:56:54,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10544, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10817, PETRI_PLACES=533, PETRI_TRANSITIONS=574} [2024-06-03 20:56:54,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-03 20:56:54,991 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 574 transitions, 10817 flow [2024-06-03 20:56:54,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:54,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:54,991 INFO L208 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 20:56:54,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-03 20:56:54,991 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 20:56:54,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash -332342818, now seen corresponding path program 19 times [2024-06-03 20:56:54,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:54,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179412981] [2024-06-03 20:56:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:54,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:55,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:55,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179412981] [2024-06-03 20:56:55,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179412981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:55,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:55,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:55,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859320534] [2024-06-03 20:56:55,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:55,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:55,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:55,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:55,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:55,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:56:55,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 574 transitions, 10817 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:55,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:55,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:56:55,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:57,138 INFO L124 PetriNetUnfolderBase]: 4061/6891 cut-off events. [2024-06-03 20:56:57,138 INFO L125 PetriNetUnfolderBase]: For 1083442/1083445 co-relation queries the response was YES. [2024-06-03 20:56:57,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49358 conditions, 6891 events. 4061/6891 cut-off events. For 1083442/1083445 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 48498 event pairs, 1164 based on Foata normal form. 10/6893 useless extension candidates. Maximal degree in co-relation 49128. Up to 6000 conditions per place. [2024-06-03 20:56:57,245 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 500 selfloop transitions, 95 changer transitions 0/601 dead transitions. [2024-06-03 20:56:57,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 601 transitions, 12093 flow [2024-06-03 20:56:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:56:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:56:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:56:57,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 20:56:57,246 INFO L175 Difference]: Start difference. First operand has 533 places, 574 transitions, 10817 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:56:57,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 601 transitions, 12093 flow [2024-06-03 20:57:04,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 601 transitions, 11840 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:57:04,608 INFO L231 Difference]: Finished difference. Result has 533 places, 574 transitions, 10762 flow [2024-06-03 20:57:04,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10564, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10762, PETRI_PLACES=533, PETRI_TRANSITIONS=574} [2024-06-03 20:57:04,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-03 20:57:04,608 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 574 transitions, 10762 flow [2024-06-03 20:57:04,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:04,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:04,608 INFO L208 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 20:57:04,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-03 20:57:04,608 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 20:57:04,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:04,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1252620384, now seen corresponding path program 8 times [2024-06-03 20:57:04,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:04,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646251581] [2024-06-03 20:57:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:04,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:04,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:04,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646251581] [2024-06-03 20:57:04,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646251581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:04,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:04,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:57:04,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29762348] [2024-06-03 20:57:04,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:04,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:57:04,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:04,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:57:04,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:57:04,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:57:04,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 574 transitions, 10762 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:04,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:04,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:57:04,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:06,852 INFO L124 PetriNetUnfolderBase]: 4127/6992 cut-off events. [2024-06-03 20:57:06,852 INFO L125 PetriNetUnfolderBase]: For 1169690/1169690 co-relation queries the response was YES. [2024-06-03 20:57:06,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51644 conditions, 6992 events. 4127/6992 cut-off events. For 1169690/1169690 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 49322 event pairs, 1168 based on Foata normal form. 6/6991 useless extension candidates. Maximal degree in co-relation 51413. Up to 6095 conditions per place. [2024-06-03 20:57:06,958 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 477 selfloop transitions, 130 changer transitions 0/613 dead transitions. [2024-06-03 20:57:06,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 613 transitions, 12494 flow [2024-06-03 20:57:06,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:57:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:57:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-03 20:57:06,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-03 20:57:06,959 INFO L175 Difference]: Start difference. First operand has 533 places, 574 transitions, 10762 flow. Second operand 12 states and 260 transitions. [2024-06-03 20:57:06,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 613 transitions, 12494 flow [2024-06-03 20:57:15,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 613 transitions, 12289 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:57:15,122 INFO L231 Difference]: Finished difference. Result has 539 places, 576 transitions, 10915 flow [2024-06-03 20:57:15,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10557, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10915, PETRI_PLACES=539, PETRI_TRANSITIONS=576} [2024-06-03 20:57:15,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 497 predicate places. [2024-06-03 20:57:15,122 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 576 transitions, 10915 flow [2024-06-03 20:57:15,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:15,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:15,122 INFO L208 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 20:57:15,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-03 20:57:15,123 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 20:57:15,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1750681620, now seen corresponding path program 9 times [2024-06-03 20:57:15,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:15,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981051755] [2024-06-03 20:57:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:15,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:15,418 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 20:57:15,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:15,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981051755] [2024-06-03 20:57:15,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981051755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:15,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:15,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:57:15,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467927461] [2024-06-03 20:57:15,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:15,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:57:15,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:15,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:57:15,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:57:15,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:57:15,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 576 transitions, 10915 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:15,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:15,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:57:15,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:17,372 INFO L124 PetriNetUnfolderBase]: 4193/7094 cut-off events. [2024-06-03 20:57:17,372 INFO L125 PetriNetUnfolderBase]: For 1287667/1287667 co-relation queries the response was YES. [2024-06-03 20:57:17,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54155 conditions, 7094 events. 4193/7094 cut-off events. For 1287667/1287667 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 50070 event pairs, 1186 based on Foata normal form. 6/7093 useless extension candidates. Maximal degree in co-relation 53923. Up to 5899 conditions per place. [2024-06-03 20:57:17,484 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 314 changer transitions 0/612 dead transitions. [2024-06-03 20:57:17,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 612 transitions, 12643 flow [2024-06-03 20:57:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:57:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:57:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-06-03 20:57:17,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234521575984991 [2024-06-03 20:57:17,485 INFO L175 Difference]: Start difference. First operand has 539 places, 576 transitions, 10915 flow. Second operand 13 states and 279 transitions. [2024-06-03 20:57:17,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 612 transitions, 12643 flow [2024-06-03 20:57:27,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 612 transitions, 12460 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 20:57:27,444 INFO L231 Difference]: Finished difference. Result has 545 places, 578 transitions, 11462 flow [2024-06-03 20:57:27,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10752, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11462, PETRI_PLACES=545, PETRI_TRANSITIONS=578} [2024-06-03 20:57:27,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 503 predicate places. [2024-06-03 20:57:27,444 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 578 transitions, 11462 flow [2024-06-03 20:57:27,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:27,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:27,444 INFO L208 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 20:57:27,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-03 20:57:27,445 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 20:57:27,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:27,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1096354348, now seen corresponding path program 10 times [2024-06-03 20:57:27,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:27,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162034942] [2024-06-03 20:57:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:27,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:27,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:27,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162034942] [2024-06-03 20:57:27,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162034942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:27,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:27,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:57:27,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18077418] [2024-06-03 20:57:27,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:27,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:57:27,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:27,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:57:27,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:57:27,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:57:27,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 578 transitions, 11462 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:27,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:27,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:57:27,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:29,599 INFO L124 PetriNetUnfolderBase]: 4175/7068 cut-off events. [2024-06-03 20:57:29,599 INFO L125 PetriNetUnfolderBase]: For 1227297/1227297 co-relation queries the response was YES. [2024-06-03 20:57:29,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52990 conditions, 7068 events. 4175/7068 cut-off events. For 1227297/1227297 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 49849 event pairs, 1184 based on Foata normal form. 8/7069 useless extension candidates. Maximal degree in co-relation 52756. Up to 5921 conditions per place. [2024-06-03 20:57:29,869 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 312 changer transitions 0/608 dead transitions. [2024-06-03 20:57:29,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 608 transitions, 12758 flow [2024-06-03 20:57:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:57:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:57:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2024-06-03 20:57:29,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159474671669794 [2024-06-03 20:57:29,870 INFO L175 Difference]: Start difference. First operand has 545 places, 578 transitions, 11462 flow. Second operand 13 states and 275 transitions. [2024-06-03 20:57:29,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 608 transitions, 12758 flow [2024-06-03 20:57:38,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 608 transitions, 12285 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-03 20:57:38,327 INFO L231 Difference]: Finished difference. Result has 550 places, 578 transitions, 11618 flow [2024-06-03 20:57:38,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10989, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11618, PETRI_PLACES=550, PETRI_TRANSITIONS=578} [2024-06-03 20:57:38,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 508 predicate places. [2024-06-03 20:57:38,327 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 578 transitions, 11618 flow [2024-06-03 20:57:38,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:38,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:38,328 INFO L208 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 20:57:38,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-03 20:57:38,328 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 20:57:38,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:38,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1484066192, now seen corresponding path program 11 times [2024-06-03 20:57:38,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:38,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877847156] [2024-06-03 20:57:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:38,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:38,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:38,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877847156] [2024-06-03 20:57:38,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877847156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:38,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:38,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:57:38,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102847999] [2024-06-03 20:57:38,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:38,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:57:38,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:38,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:57:38,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:57:38,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:57:38,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 578 transitions, 11618 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:38,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:38,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:57:38,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:40,568 INFO L124 PetriNetUnfolderBase]: 4231/7155 cut-off events. [2024-06-03 20:57:40,569 INFO L125 PetriNetUnfolderBase]: For 1341757/1341757 co-relation queries the response was YES. [2024-06-03 20:57:40,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54124 conditions, 7155 events. 4231/7155 cut-off events. For 1341757/1341757 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 50497 event pairs, 1193 based on Foata normal form. 16/7166 useless extension candidates. Maximal degree in co-relation 53888. Up to 6331 conditions per place. [2024-06-03 20:57:40,681 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 470 selfloop transitions, 129 changer transitions 0/605 dead transitions. [2024-06-03 20:57:40,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 605 transitions, 12986 flow [2024-06-03 20:57:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:57:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:57:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-03 20:57:40,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-03 20:57:40,682 INFO L175 Difference]: Start difference. First operand has 550 places, 578 transitions, 11618 flow. Second operand 8 states and 183 transitions. [2024-06-03 20:57:40,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 605 transitions, 12986 flow [2024-06-03 20:57:49,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 605 transitions, 12553 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 20:57:49,993 INFO L231 Difference]: Finished difference. Result has 548 places, 580 transitions, 11543 flow [2024-06-03 20:57:49,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11185, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11543, PETRI_PLACES=548, PETRI_TRANSITIONS=580} [2024-06-03 20:57:49,993 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 506 predicate places. [2024-06-03 20:57:49,993 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 580 transitions, 11543 flow [2024-06-03 20:57:49,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:49,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:49,994 INFO L208 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 20:57:49,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-03 20:57:49,994 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 20:57:49,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1791984724, now seen corresponding path program 5 times [2024-06-03 20:57:49,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:49,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056047336] [2024-06-03 20:57:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:49,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:50,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:50,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056047336] [2024-06-03 20:57:50,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056047336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:50,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:50,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:50,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175865696] [2024-06-03 20:57:50,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:50,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:50,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:50,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:50,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:50,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:57:50,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 580 transitions, 11543 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:50,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:50,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:57:50,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:52,224 INFO L124 PetriNetUnfolderBase]: 4251/7207 cut-off events. [2024-06-03 20:57:52,225 INFO L125 PetriNetUnfolderBase]: For 1237431/1237434 co-relation queries the response was YES. [2024-06-03 20:57:52,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54236 conditions, 7207 events. 4251/7207 cut-off events. For 1237431/1237434 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 51069 event pairs, 1164 based on Foata normal form. 8/7205 useless extension candidates. Maximal degree in co-relation 53999. Up to 5916 conditions per place. [2024-06-03 20:57:52,342 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 469 selfloop transitions, 144 changer transitions 0/619 dead transitions. [2024-06-03 20:57:52,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 619 transitions, 13237 flow [2024-06-03 20:57:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:57:52,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:57:52,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-03 20:57:52,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:57:52,343 INFO L175 Difference]: Start difference. First operand has 548 places, 580 transitions, 11543 flow. Second operand 11 states and 242 transitions. [2024-06-03 20:57:52,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 619 transitions, 13237 flow [2024-06-03 20:58:00,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 619 transitions, 12918 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-03 20:58:00,060 INFO L231 Difference]: Finished difference. Result has 554 places, 581 transitions, 11542 flow [2024-06-03 20:58:00,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11224, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11542, PETRI_PLACES=554, PETRI_TRANSITIONS=581} [2024-06-03 20:58:00,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 512 predicate places. [2024-06-03 20:58:00,060 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 581 transitions, 11542 flow [2024-06-03 20:58:00,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:00,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:00,061 INFO L208 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 20:58:00,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-03 20:58:00,061 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 20:58:00,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:00,061 INFO L85 PathProgramCache]: Analyzing trace with hash -22003822, now seen corresponding path program 12 times [2024-06-03 20:58:00,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:00,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914158778] [2024-06-03 20:58:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:00,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:00,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:00,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914158778] [2024-06-03 20:58:00,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914158778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:00,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:00,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:58:00,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693617577] [2024-06-03 20:58:00,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:00,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:58:00,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:00,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:58:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:58:00,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:58:00,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 581 transitions, 11542 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:00,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:00,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:58:00,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:02,558 INFO L124 PetriNetUnfolderBase]: 4337/7337 cut-off events. [2024-06-03 20:58:02,558 INFO L125 PetriNetUnfolderBase]: For 1430413/1430413 co-relation queries the response was YES. [2024-06-03 20:58:02,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56651 conditions, 7337 events. 4337/7337 cut-off events. For 1430413/1430413 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 52024 event pairs, 1211 based on Foata normal form. 12/7344 useless extension candidates. Maximal degree in co-relation 56413. Up to 6305 conditions per place. [2024-06-03 20:58:02,678 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 474 selfloop transitions, 136 changer transitions 0/616 dead transitions. [2024-06-03 20:58:02,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 616 transitions, 13330 flow [2024-06-03 20:58:02,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:58:02,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:58:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 20:58:02,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-03 20:58:02,678 INFO L175 Difference]: Start difference. First operand has 554 places, 581 transitions, 11542 flow. Second operand 8 states and 190 transitions. [2024-06-03 20:58:02,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 616 transitions, 13330 flow [2024-06-03 20:58:10,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 616 transitions, 12758 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-03 20:58:10,906 INFO L231 Difference]: Finished difference. Result has 550 places, 584 transitions, 11392 flow [2024-06-03 20:58:10,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10970, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11392, PETRI_PLACES=550, PETRI_TRANSITIONS=584} [2024-06-03 20:58:10,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 508 predicate places. [2024-06-03 20:58:10,907 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 584 transitions, 11392 flow [2024-06-03 20:58:10,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:10,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:10,907 INFO L208 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 20:58:10,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-03 20:58:10,907 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 20:58:10,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:10,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1478703812, now seen corresponding path program 13 times [2024-06-03 20:58:10,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:10,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435009485] [2024-06-03 20:58:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:10,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:11,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:11,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435009485] [2024-06-03 20:58:11,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435009485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:11,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:11,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:58:11,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983533752] [2024-06-03 20:58:11,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:11,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:58:11,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:58:11,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:58:11,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:58:11,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 584 transitions, 11392 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:11,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:11,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:58:11,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:13,275 INFO L124 PetriNetUnfolderBase]: 4393/7421 cut-off events. [2024-06-03 20:58:13,276 INFO L125 PetriNetUnfolderBase]: For 1505376/1505376 co-relation queries the response was YES. [2024-06-03 20:58:13,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56499 conditions, 7421 events. 4393/7421 cut-off events. For 1505376/1505376 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 52626 event pairs, 1231 based on Foata normal form. 16/7432 useless extension candidates. Maximal degree in co-relation 56263. Up to 6585 conditions per place. [2024-06-03 20:58:13,392 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 475 selfloop transitions, 132 changer transitions 0/613 dead transitions. [2024-06-03 20:58:13,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 613 transitions, 12788 flow [2024-06-03 20:58:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:58:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:58:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-03 20:58:13,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-03 20:58:13,393 INFO L175 Difference]: Start difference. First operand has 550 places, 584 transitions, 11392 flow. Second operand 10 states and 217 transitions. [2024-06-03 20:58:13,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 613 transitions, 12788 flow [2024-06-03 20:58:23,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 613 transitions, 12313 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-03 20:58:23,656 INFO L231 Difference]: Finished difference. Result has 555 places, 586 transitions, 11289 flow [2024-06-03 20:58:23,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10929, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11289, PETRI_PLACES=555, PETRI_TRANSITIONS=586} [2024-06-03 20:58:23,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 513 predicate places. [2024-06-03 20:58:23,656 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 586 transitions, 11289 flow [2024-06-03 20:58:23,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:23,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:23,657 INFO L208 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 20:58:23,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-03 20:58:23,657 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 20:58:23,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash 154340980, now seen corresponding path program 6 times [2024-06-03 20:58:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098141812] [2024-06-03 20:58:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:23,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:23,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:23,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098141812] [2024-06-03 20:58:23,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098141812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:23,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:23,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:23,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998552715] [2024-06-03 20:58:23,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:23,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:23,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:23,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:23,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:24,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:58:24,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 586 transitions, 11289 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:24,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:24,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:58:24,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:25,930 INFO L124 PetriNetUnfolderBase]: 4413/7465 cut-off events. [2024-06-03 20:58:25,930 INFO L125 PetriNetUnfolderBase]: For 1387747/1387750 co-relation queries the response was YES. [2024-06-03 20:58:26,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55849 conditions, 7465 events. 4413/7465 cut-off events. For 1387747/1387750 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 53073 event pairs, 1198 based on Foata normal form. 8/7463 useless extension candidates. Maximal degree in co-relation 55612. Up to 6150 conditions per place. [2024-06-03 20:58:26,059 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 475 selfloop transitions, 142 changer transitions 0/623 dead transitions. [2024-06-03 20:58:26,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 623 transitions, 12987 flow [2024-06-03 20:58:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:58:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:58:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-03 20:58:26,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532150776053215 [2024-06-03 20:58:26,059 INFO L175 Difference]: Start difference. First operand has 555 places, 586 transitions, 11289 flow. Second operand 11 states and 240 transitions. [2024-06-03 20:58:26,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 623 transitions, 12987 flow [2024-06-03 20:58:38,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 623 transitions, 12669 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-03 20:58:38,105 INFO L231 Difference]: Finished difference. Result has 559 places, 587 transitions, 11271 flow [2024-06-03 20:58:38,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10971, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11271, PETRI_PLACES=559, PETRI_TRANSITIONS=587} [2024-06-03 20:58:38,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 517 predicate places. [2024-06-03 20:58:38,106 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 587 transitions, 11271 flow [2024-06-03 20:58:38,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:38,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:38,106 INFO L208 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 20:58:38,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-03 20:58:38,106 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 20:58:38,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:38,106 INFO L85 PathProgramCache]: Analyzing trace with hash -230466730, now seen corresponding path program 14 times [2024-06-03 20:58:38,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:38,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649029675] [2024-06-03 20:58:38,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:38,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:38,419 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 20:58:38,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:38,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649029675] [2024-06-03 20:58:38,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649029675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:38,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:38,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:58:38,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183919496] [2024-06-03 20:58:38,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:38,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:58:38,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:38,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:58:38,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:58:38,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:58:38,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 587 transitions, 11271 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:38,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:38,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:58:38,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:40,489 INFO L124 PetriNetUnfolderBase]: 4479/7559 cut-off events. [2024-06-03 20:58:40,489 INFO L125 PetriNetUnfolderBase]: For 1507609/1507609 co-relation queries the response was YES. [2024-06-03 20:58:40,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58062 conditions, 7559 events. 4479/7559 cut-off events. For 1507609/1507609 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 53733 event pairs, 1241 based on Foata normal form. 6/7558 useless extension candidates. Maximal degree in co-relation 57824. Up to 6631 conditions per place. [2024-06-03 20:58:40,610 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 486 selfloop transitions, 134 changer transitions 0/626 dead transitions. [2024-06-03 20:58:40,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 626 transitions, 13057 flow [2024-06-03 20:58:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:58:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:58:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-03 20:58:40,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 20:58:40,611 INFO L175 Difference]: Start difference. First operand has 559 places, 587 transitions, 11271 flow. Second operand 12 states and 258 transitions. [2024-06-03 20:58:40,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 626 transitions, 13057 flow [2024-06-03 20:58:52,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 626 transitions, 12798 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:58:52,684 INFO L231 Difference]: Finished difference. Result has 563 places, 589 transitions, 11390 flow [2024-06-03 20:58:52,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11012, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11390, PETRI_PLACES=563, PETRI_TRANSITIONS=589} [2024-06-03 20:58:52,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 521 predicate places. [2024-06-03 20:58:52,685 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 589 transitions, 11390 flow [2024-06-03 20:58:52,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:52,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:52,685 INFO L208 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 20:58:52,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-03 20:58:52,685 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 20:58:52,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:52,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1703408362, now seen corresponding path program 15 times [2024-06-03 20:58:52,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:52,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206701073] [2024-06-03 20:58:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:52,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:52,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:52,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206701073] [2024-06-03 20:58:52,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206701073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:52,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:52,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:58:52,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243249222] [2024-06-03 20:58:52,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:52,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:58:52,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:52,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:58:52,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:58:53,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:58:53,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 589 transitions, 11390 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:53,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:53,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:58:53,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:55,122 INFO L124 PetriNetUnfolderBase]: 4545/7676 cut-off events. [2024-06-03 20:58:55,122 INFO L125 PetriNetUnfolderBase]: For 1642690/1642690 co-relation queries the response was YES. [2024-06-03 20:58:55,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60662 conditions, 7676 events. 4545/7676 cut-off events. For 1642690/1642690 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 54756 event pairs, 1268 based on Foata normal form. 6/7675 useless extension candidates. Maximal degree in co-relation 60423. Up to 6451 conditions per place. [2024-06-03 20:58:55,248 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 297 selfloop transitions, 322 changer transitions 0/625 dead transitions. [2024-06-03 20:58:55,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 625 transitions, 13172 flow [2024-06-03 20:58:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:58:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:58:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 278 transitions. [2024-06-03 20:58:55,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215759849906192 [2024-06-03 20:58:55,249 INFO L175 Difference]: Start difference. First operand has 563 places, 589 transitions, 11390 flow. Second operand 13 states and 278 transitions. [2024-06-03 20:58:55,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 625 transitions, 13172 flow [2024-06-03 20:59:08,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 625 transitions, 12944 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-03 20:59:08,922 INFO L231 Difference]: Finished difference. Result has 569 places, 591 transitions, 11920 flow [2024-06-03 20:59:08,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11190, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11920, PETRI_PLACES=569, PETRI_TRANSITIONS=591} [2024-06-03 20:59:08,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 527 predicate places. [2024-06-03 20:59:08,922 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 591 transitions, 11920 flow [2024-06-03 20:59:08,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:08,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:08,923 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] [2024-06-03 20:59:08,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-03 20:59:08,923 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 20:59:08,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:08,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1478488610, now seen corresponding path program 4 times [2024-06-03 20:59:08,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:08,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166662305] [2024-06-03 20:59:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:08,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:09,225 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 20:59:09,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:09,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166662305] [2024-06-03 20:59:09,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166662305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:09,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:09,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:59:09,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603191208] [2024-06-03 20:59:09,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:09,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:59:09,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:09,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:59:09,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:59:09,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:59:09,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 591 transitions, 11920 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:09,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:09,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:59:09,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:11,352 INFO L124 PetriNetUnfolderBase]: 4565/7705 cut-off events. [2024-06-03 20:59:11,352 INFO L125 PetriNetUnfolderBase]: For 1657839/1657839 co-relation queries the response was YES. [2024-06-03 20:59:11,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61224 conditions, 7705 events. 4565/7705 cut-off events. For 1657839/1657839 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 54939 event pairs, 1275 based on Foata normal form. 6/7706 useless extension candidates. Maximal degree in co-relation 60983. Up to 6757 conditions per place. [2024-06-03 20:59:11,629 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 479 selfloop transitions, 137 changer transitions 0/622 dead transitions. [2024-06-03 20:59:11,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 622 transitions, 13308 flow [2024-06-03 20:59:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:59:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:59:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-03 20:59:11,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-03 20:59:11,629 INFO L175 Difference]: Start difference. First operand has 569 places, 591 transitions, 11920 flow. Second operand 10 states and 219 transitions. [2024-06-03 20:59:11,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 622 transitions, 13308 flow [2024-06-03 20:59:21,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 622 transitions, 12946 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 20:59:21,974 INFO L231 Difference]: Finished difference. Result has 572 places, 592 transitions, 11892 flow [2024-06-03 20:59:21,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11558, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11892, PETRI_PLACES=572, PETRI_TRANSITIONS=592} [2024-06-03 20:59:21,974 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 530 predicate places. [2024-06-03 20:59:21,974 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 592 transitions, 11892 flow [2024-06-03 20:59:21,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:21,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:21,975 INFO L208 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 20:59:21,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-03 20:59:21,976 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 20:59:21,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1844784286, now seen corresponding path program 7 times [2024-06-03 20:59:21,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:21,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663147468] [2024-06-03 20:59:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:21,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:22,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:22,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663147468] [2024-06-03 20:59:22,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663147468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:22,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:22,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:59:22,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091545132] [2024-06-03 20:59:22,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:22,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:59:22,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:59:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:59:22,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:59:22,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 592 transitions, 11892 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:22,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:22,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:59:22,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:24,402 INFO L124 PetriNetUnfolderBase]: 4585/7757 cut-off events. [2024-06-03 20:59:24,402 INFO L125 PetriNetUnfolderBase]: For 1675183/1675186 co-relation queries the response was YES. [2024-06-03 20:59:24,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61516 conditions, 7757 events. 4585/7757 cut-off events. For 1675183/1675186 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 55499 event pairs, 1284 based on Foata normal form. 8/7755 useless extension candidates. Maximal degree in co-relation 61273. Up to 6812 conditions per place. [2024-06-03 20:59:24,528 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 485 selfloop transitions, 130 changer transitions 0/621 dead transitions. [2024-06-03 20:59:24,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 621 transitions, 13229 flow [2024-06-03 20:59:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:59:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:59:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-03 20:59:24,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516629711751663 [2024-06-03 20:59:24,529 INFO L175 Difference]: Start difference. First operand has 572 places, 592 transitions, 11892 flow. Second operand 11 states and 233 transitions. [2024-06-03 20:59:24,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 621 transitions, 13229 flow [2024-06-03 20:59:38,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 621 transitions, 12842 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-03 20:59:38,277 INFO L231 Difference]: Finished difference. Result has 574 places, 593 transitions, 11784 flow [2024-06-03 20:59:38,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11505, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11784, PETRI_PLACES=574, PETRI_TRANSITIONS=593} [2024-06-03 20:59:38,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 532 predicate places. [2024-06-03 20:59:38,278 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 593 transitions, 11784 flow [2024-06-03 20:59:38,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:38,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:38,278 INFO L208 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 20:59:38,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-03 20:59:38,279 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 20:59:38,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:38,279 INFO L85 PathProgramCache]: Analyzing trace with hash -141753100, now seen corresponding path program 16 times [2024-06-03 20:59:38,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:38,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502828800] [2024-06-03 20:59:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:38,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:38,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:38,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502828800] [2024-06-03 20:59:38,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502828800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:38,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:38,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:59:38,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750383287] [2024-06-03 20:59:38,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:38,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:59:38,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:38,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:59:38,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:59:38,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:59:38,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 593 transitions, 11784 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:38,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:38,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:59:38,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:40,710 INFO L124 PetriNetUnfolderBase]: 4567/7720 cut-off events. [2024-06-03 20:59:40,710 INFO L125 PetriNetUnfolderBase]: For 1606897/1606897 co-relation queries the response was YES. [2024-06-03 20:59:40,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59744 conditions, 7720 events. 4567/7720 cut-off events. For 1606897/1606897 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 55217 event pairs, 1280 based on Foata normal form. 8/7721 useless extension candidates. Maximal degree in co-relation 59500. Up to 6889 conditions per place. [2024-06-03 20:59:40,839 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 489 selfloop transitions, 127 changer transitions 0/622 dead transitions. [2024-06-03 20:59:40,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 622 transitions, 13106 flow [2024-06-03 20:59:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:59:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:59:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-03 20:59:40,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101626016260162 [2024-06-03 20:59:40,840 INFO L175 Difference]: Start difference. First operand has 574 places, 593 transitions, 11784 flow. Second operand 12 states and 251 transitions. [2024-06-03 20:59:40,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 622 transitions, 13106 flow [2024-06-03 20:59:54,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 622 transitions, 12792 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-03 20:59:54,758 INFO L231 Difference]: Finished difference. Result has 576 places, 593 transitions, 11729 flow [2024-06-03 20:59:54,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11470, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11729, PETRI_PLACES=576, PETRI_TRANSITIONS=593} [2024-06-03 20:59:54,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 534 predicate places. [2024-06-03 20:59:54,759 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 593 transitions, 11729 flow [2024-06-03 20:59:54,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:54,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:54,759 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, 1] [2024-06-03 20:59:54,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-03 20:59:54,759 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 20:59:54,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:54,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2086058066, now seen corresponding path program 8 times [2024-06-03 20:59:54,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:54,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890733484] [2024-06-03 20:59:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:54,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:55,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:55,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890733484] [2024-06-03 20:59:55,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890733484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:55,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:55,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:59:55,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088288270] [2024-06-03 20:59:55,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:55,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:59:55,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:55,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:59:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:59:55,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:59:55,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 593 transitions, 11729 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:55,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:55,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:59:55,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:57,232 INFO L124 PetriNetUnfolderBase]: 4587/7755 cut-off events. [2024-06-03 20:59:57,232 INFO L125 PetriNetUnfolderBase]: For 1592512/1592515 co-relation queries the response was YES. [2024-06-03 20:59:57,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59753 conditions, 7755 events. 4587/7755 cut-off events. For 1592512/1592515 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 55096 event pairs, 1039 based on Foata normal form. 8/7743 useless extension candidates. Maximal degree in co-relation 59508. Up to 5244 conditions per place. [2024-06-03 20:59:57,356 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 450 selfloop transitions, 177 changer transitions 0/633 dead transitions. [2024-06-03 20:59:57,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 633 transitions, 13795 flow [2024-06-03 20:59:57,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:59:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:59:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-03 20:59:57,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-03 20:59:57,357 INFO L175 Difference]: Start difference. First operand has 576 places, 593 transitions, 11729 flow. Second operand 10 states and 226 transitions. [2024-06-03 20:59:57,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 633 transitions, 13795 flow [2024-06-03 21:00:10,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 633 transitions, 13580 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 21:00:10,822 INFO L231 Difference]: Finished difference. Result has 577 places, 594 transitions, 11890 flow [2024-06-03 21:00:10,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11514, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11890, PETRI_PLACES=577, PETRI_TRANSITIONS=594} [2024-06-03 21:00:10,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 535 predicate places. [2024-06-03 21:00:10,822 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 594 transitions, 11890 flow [2024-06-03 21:00:10,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:10,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:10,822 INFO L208 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 21:00:10,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-03 21:00:10,822 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 21:00:10,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:10,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1701548886, now seen corresponding path program 17 times [2024-06-03 21:00:10,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:10,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449751340] [2024-06-03 21:00:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:10,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:00:11,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:11,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449751340] [2024-06-03 21:00:11,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449751340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:11,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:11,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 21:00:11,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434166980] [2024-06-03 21:00:11,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:11,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 21:00:11,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:11,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 21:00:11,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 21:00:11,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 21:00:11,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 594 transitions, 11890 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:11,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:11,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 21:00:11,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:13,574 INFO L124 PetriNetUnfolderBase]: 4961/8382 cut-off events. [2024-06-03 21:00:13,574 INFO L125 PetriNetUnfolderBase]: For 1737931/1737931 co-relation queries the response was YES. [2024-06-03 21:00:13,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65045 conditions, 8382 events. 4961/8382 cut-off events. For 1737931/1737931 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 60737 event pairs, 1292 based on Foata normal form. 6/8381 useless extension candidates. Maximal degree in co-relation 64799. Up to 5766 conditions per place. [2024-06-03 21:00:13,842 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 470 selfloop transitions, 166 changer transitions 2/644 dead transitions. [2024-06-03 21:00:13,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 644 transitions, 14165 flow [2024-06-03 21:00:13,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 21:00:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 21:00:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-03 21:00:13,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549889135254989 [2024-06-03 21:00:13,843 INFO L175 Difference]: Start difference. First operand has 577 places, 594 transitions, 11890 flow. Second operand 11 states and 248 transitions. [2024-06-03 21:00:13,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 644 transitions, 14165 flow [2024-06-03 21:00:28,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 644 transitions, 13711 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 21:00:28,618 INFO L231 Difference]: Finished difference. Result has 581 places, 601 transitions, 12035 flow [2024-06-03 21:00:28,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11436, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12035, PETRI_PLACES=581, PETRI_TRANSITIONS=601} [2024-06-03 21:00:28,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 539 predicate places. [2024-06-03 21:00:28,618 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 601 transitions, 12035 flow [2024-06-03 21:00:28,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:28,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:28,618 INFO L208 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 21:00:28,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-03 21:00:28,618 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 21:00:28,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:28,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2086356596, now seen corresponding path program 9 times [2024-06-03 21:00:28,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:28,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609584708] [2024-06-03 21:00:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:28,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:28,918 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 21:00:28,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:28,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609584708] [2024-06-03 21:00:28,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609584708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:28,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:28,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:00:28,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233959309] [2024-06-03 21:00:28,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:28,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:00:28,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:28,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:00:28,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:00:28,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 21:00:28,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 601 transitions, 12035 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:28,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:28,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 21:00:28,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:31,237 INFO L124 PetriNetUnfolderBase]: 4981/8425 cut-off events. [2024-06-03 21:00:31,237 INFO L125 PetriNetUnfolderBase]: For 1757819/1757822 co-relation queries the response was YES. [2024-06-03 21:00:31,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65029 conditions, 8425 events. 4981/8425 cut-off events. For 1757819/1757822 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 61061 event pairs, 1154 based on Foata normal form. 8/8409 useless extension candidates. Maximal degree in co-relation 64782. Up to 5870 conditions per place. [2024-06-03 21:00:31,371 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 460 selfloop transitions, 174 changer transitions 0/640 dead transitions. [2024-06-03 21:00:31,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 640 transitions, 14120 flow [2024-06-03 21:00:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 21:00:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 21:00:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 21:00:31,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 21:00:31,372 INFO L175 Difference]: Start difference. First operand has 581 places, 601 transitions, 12035 flow. Second operand 10 states and 225 transitions. [2024-06-03 21:00:31,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 640 transitions, 14120 flow [2024-06-03 21:00:46,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 640 transitions, 13816 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 21:00:46,149 INFO L231 Difference]: Finished difference. Result has 584 places, 602 transitions, 12092 flow [2024-06-03 21:00:46,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11731, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12092, PETRI_PLACES=584, PETRI_TRANSITIONS=602} [2024-06-03 21:00:46,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 542 predicate places. [2024-06-03 21:00:46,150 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 602 transitions, 12092 flow [2024-06-03 21:00:46,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:46,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:46,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:00:46,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-03 21:00:46,150 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 21:00:46,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:46,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2044929362, now seen corresponding path program 18 times [2024-06-03 21:00:46,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:46,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750114243] [2024-06-03 21:00:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:46,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:00:46,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:46,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750114243] [2024-06-03 21:00:46,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750114243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:46,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:46,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 21:00:46,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69255840] [2024-06-03 21:00:46,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:46,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 21:00:46,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:46,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 21:00:46,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 21:00:46,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 21:00:46,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 602 transitions, 12092 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:46,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:46,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 21:00:46,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:49,001 INFO L124 PetriNetUnfolderBase]: 5001/8480 cut-off events. [2024-06-03 21:00:49,001 INFO L125 PetriNetUnfolderBase]: For 1774167/1774167 co-relation queries the response was YES. [2024-06-03 21:00:49,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65433 conditions, 8480 events. 5001/8480 cut-off events. For 1774167/1774167 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 62087 event pairs, 1348 based on Foata normal form. 6/8485 useless extension candidates. Maximal degree in co-relation 65185. Up to 7686 conditions per place. [2024-06-03 21:00:49,150 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 593 selfloop transitions, 39 changer transitions 0/638 dead transitions. [2024-06-03 21:00:49,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 638 transitions, 13524 flow [2024-06-03 21:00:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 21:00:49,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 21:00:49,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-03 21:00:49,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033259423503326 [2024-06-03 21:00:49,151 INFO L175 Difference]: Start difference. First operand has 584 places, 602 transitions, 12092 flow. Second operand 11 states and 227 transitions. [2024-06-03 21:00:49,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 638 transitions, 13524 flow Killed by 15