./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 16:15:02,241 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:15:02,303 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:15:02,309 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:15:02,311 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:15:02,330 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:15:02,331 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:15:02,331 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:15:02,332 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:15:02,335 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:15:02,335 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:15:02,335 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:15:02,336 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:15:02,337 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:15:02,337 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:15:02,337 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:15:02,338 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:15:02,338 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:15:02,338 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:15:02,338 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:15:02,339 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:15:02,340 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:15:02,340 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:15:02,340 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:15:02,340 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:15:02,340 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:15:02,341 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:15:02,341 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:15:02,341 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:15:02,341 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:15:02,342 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:15:02,342 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:15:02,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:15:02,343 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:15:02,343 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:15:02,343 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:15:02,344 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:15:02,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:15:02,344 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:15:02,344 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:15:02,344 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:15:02,345 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:15:02,345 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:15:02,345 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:15:02,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:15:02,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:15:02,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:15:02,573 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:15:02,574 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:15:02,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-04 16:15:02,662 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:15:02,663 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:15:02,663 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:15:03,767 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:15:03,985 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:15:03,988 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:15:04,006 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db40612da/b2a79789793249adb7e699030bf017cd/FLAG77267842b [2024-06-04 16:15:04,027 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db40612da/b2a79789793249adb7e699030bf017cd [2024-06-04 16:15:04,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:15:04,029 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:15:04,032 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:15:04,032 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:15:04,035 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:15:04,036 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:15:02" (1/2) ... [2024-06-04 16:15:04,037 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7004d55d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:04, skipping insertion in model container [2024-06-04 16:15:04,037 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:15:02" (1/2) ... [2024-06-04 16:15:04,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@613700d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:04, skipping insertion in model container [2024-06-04 16:15:04,039 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:15:04" (2/2) ... [2024-06-04 16:15:04,039 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7004d55d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04, skipping insertion in model container [2024-06-04 16:15:04,039 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:15:04" (2/2) ... [2024-06-04 16:15:04,040 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:15:04,084 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:15:04,086 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (1LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL))) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 16:15:04,086 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (1LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL))) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 16:15:04,086 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (1LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL))) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 16:15:04,086 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:15:04,086 INFO L106 edCorrectnessWitness]: ghost_update [L778-L778] multithreaded = 1; [2024-06-04 16:15:04,123 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:15:04,389 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:15:04,397 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:15:04,543 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:15:04,616 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:15:04,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04 WrapperNode [2024-06-04 16:15:04,619 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:15:04,620 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:15:04,620 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:15:04,621 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:15:04,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (1/1) ... [2024-06-04 16:15:04,656 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (1/1) ... [2024-06-04 16:15:04,707 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-04 16:15:04,708 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:15:04,709 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:15:04,709 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:15:04,709 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:15:04,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (1/1) ... [2024-06-04 16:15:04,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (1/1) ... [2024-06-04 16:15:04,722 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (1/1) ... [2024-06-04 16:15:04,746 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 16:15:04,746 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (1/1) ... [2024-06-04 16:15:04,747 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (1/1) ... [2024-06-04 16:15:04,757 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (1/1) ... [2024-06-04 16:15:04,764 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (1/1) ... [2024-06-04 16:15:04,769 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (1/1) ... [2024-06-04 16:15:04,770 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (1/1) ... [2024-06-04 16:15:04,773 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:15:04,778 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:15:04,779 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:15:04,779 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:15:04,780 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (1/1) ... [2024-06-04 16:15:04,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:15:04,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:15:04,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 16:15:04,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 16:15:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:15:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:15:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:15:04,858 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:15:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:15:04,859 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:15:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:15:04,859 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:15:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:15:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:15:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:15:04,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:15:04,860 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:15:04,953 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:15:04,955 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:15:05,175 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:15:05,175 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:15:05,297 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:15:05,298 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:15:05,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:15:05 BoogieIcfgContainer [2024-06-04 16:15:05,299 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:15:05,301 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:15:05,301 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:15:05,304 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:15:05,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:15:02" (1/4) ... [2024-06-04 16:15:05,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b768ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:15:05, skipping insertion in model container [2024-06-04 16:15:05,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:15:04" (2/4) ... [2024-06-04 16:15:05,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b768ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:15:05, skipping insertion in model container [2024-06-04 16:15:05,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04" (3/4) ... [2024-06-04 16:15:05,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b768ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:15:05, skipping insertion in model container [2024-06-04 16:15:05,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:15:05" (4/4) ... [2024-06-04 16:15:05,306 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:15:05,319 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:15:05,320 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:15:05,320 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:15:05,362 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:15:05,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:15:05,419 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-04 16:15:05,420 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:15:05,421 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 5. Compared 65 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 16:15:05,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:15:05,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-04 16:15:05,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:15:05,442 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;@54a6c960, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:15:05,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:15:05,446 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:15:05,446 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:15:05,446 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:15:05,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:05,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:15:05,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:05,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:05,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1921533817, now seen corresponding path program 1 times [2024-06-04 16:15:05,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:05,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172908243] [2024-06-04 16:15:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:05,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:05,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:05,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172908243] [2024-06-04 16:15:05,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172908243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:05,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:05,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:15:05,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586361269] [2024-06-04 16:15:05,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:05,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:15:06,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:06,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:15:06,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:15:06,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-04 16:15:06,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:06,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:06,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-04 16:15:06,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:06,275 INFO L124 PetriNetUnfolderBase]: 367/638 cut-off events. [2024-06-04 16:15:06,275 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-04 16:15:06,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 638 events. 367/638 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2991 event pairs, 215 based on Foata normal form. 1/603 useless extension candidates. Maximal degree in co-relation 1261. Up to 581 conditions per place. [2024-06-04 16:15:06,286 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 28 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-04 16:15:06,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 163 flow [2024-06-04 16:15:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:15:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:15:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-04 16:15:06,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2024-06-04 16:15:06,299 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 86 transitions. [2024-06-04 16:15:06,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 163 flow [2024-06-04 16:15:06,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:06,304 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-04 16:15:06,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-04 16:15:06,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 16:15:06,308 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-04 16:15:06,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:06,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:06,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:06,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:15:06,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:06,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:06,311 INFO L85 PathProgramCache]: Analyzing trace with hash 241980262, now seen corresponding path program 1 times [2024-06-04 16:15:06,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:06,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212852605] [2024-06-04 16:15:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:06,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:06,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:06,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212852605] [2024-06-04 16:15:06,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212852605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:06,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:06,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:15:06,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423734306] [2024-06-04 16:15:06,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:06,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:15:06,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:06,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:15:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:15:06,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-04 16:15:06,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:06,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:06,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-04 16:15:06,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:06,846 INFO L124 PetriNetUnfolderBase]: 462/800 cut-off events. [2024-06-04 16:15:06,846 INFO L125 PetriNetUnfolderBase]: For 179/209 co-relation queries the response was YES. [2024-06-04 16:15:06,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 800 events. 462/800 cut-off events. For 179/209 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3870 event pairs, 231 based on Foata normal form. 3/785 useless extension candidates. Maximal degree in co-relation 1828. Up to 705 conditions per place. [2024-06-04 16:15:06,852 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-04 16:15:06,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 248 flow [2024-06-04 16:15:06,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-04 16:15:06,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-06-04 16:15:06,857 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 110 transitions. [2024-06-04 16:15:06,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 248 flow [2024-06-04 16:15:06,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:15:06,859 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-04 16:15:06,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-04 16:15:06,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-04 16:15:06,860 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-04 16:15:06,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:06,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:06,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:06,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:15:06,863 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:06,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:06,865 INFO L85 PathProgramCache]: Analyzing trace with hash 894390161, now seen corresponding path program 1 times [2024-06-04 16:15:06,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:06,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589006832] [2024-06-04 16:15:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:06,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:07,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:07,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589006832] [2024-06-04 16:15:07,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589006832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:07,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:07,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:15:07,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805126724] [2024-06-04 16:15:07,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:07,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:15:07,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:07,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:15:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:15:07,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:15:07,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:07,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:07,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:15:07,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:07,374 INFO L124 PetriNetUnfolderBase]: 622/1045 cut-off events. [2024-06-04 16:15:07,374 INFO L125 PetriNetUnfolderBase]: For 570/587 co-relation queries the response was YES. [2024-06-04 16:15:07,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2702 conditions, 1045 events. 622/1045 cut-off events. For 570/587 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5242 event pairs, 276 based on Foata normal form. 3/1027 useless extension candidates. Maximal degree in co-relation 2684. Up to 942 conditions per place. [2024-06-04 16:15:07,380 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 37 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2024-06-04 16:15:07,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 288 flow [2024-06-04 16:15:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-04 16:15:07,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-04 16:15:07,381 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 4 states and 105 transitions. [2024-06-04 16:15:07,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 288 flow [2024-06-04 16:15:07,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 286 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-04 16:15:07,383 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 200 flow [2024-06-04 16:15:07,383 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2024-06-04 16:15:07,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-04 16:15:07,384 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 200 flow [2024-06-04 16:15:07,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:07,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:07,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:07,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:15:07,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:07,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:07,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1843335900, now seen corresponding path program 1 times [2024-06-04 16:15:07,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:07,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217041377] [2024-06-04 16:15:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:07,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:07,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:07,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217041377] [2024-06-04 16:15:07,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217041377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:07,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:07,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:07,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509139124] [2024-06-04 16:15:07,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:07,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:07,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:07,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:07,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:15:07,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:07,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:07,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:15:07,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:07,799 INFO L124 PetriNetUnfolderBase]: 680/1146 cut-off events. [2024-06-04 16:15:07,799 INFO L125 PetriNetUnfolderBase]: For 1224/1237 co-relation queries the response was YES. [2024-06-04 16:15:07,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3333 conditions, 1146 events. 680/1146 cut-off events. For 1224/1237 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5681 event pairs, 187 based on Foata normal form. 15/1121 useless extension candidates. Maximal degree in co-relation 3312. Up to 958 conditions per place. [2024-06-04 16:15:07,806 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-04 16:15:07,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 414 flow [2024-06-04 16:15:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 16:15:07,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-04 16:15:07,809 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 200 flow. Second operand 6 states and 153 transitions. [2024-06-04 16:15:07,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 414 flow [2024-06-04 16:15:07,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 396 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:07,814 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 239 flow [2024-06-04 16:15:07,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=239, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-04 16:15:07,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-04 16:15:07,816 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 239 flow [2024-06-04 16:15:07,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:07,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:07,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:07,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:15:07,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:07,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:07,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1123605808, now seen corresponding path program 1 times [2024-06-04 16:15:07,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:07,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048653653] [2024-06-04 16:15:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:07,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:08,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:08,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048653653] [2024-06-04 16:15:08,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048653653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:08,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:08,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:08,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330934001] [2024-06-04 16:15:08,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:08,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:08,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:08,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:08,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:08,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:08,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:08,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:08,406 INFO L124 PetriNetUnfolderBase]: 747/1260 cut-off events. [2024-06-04 16:15:08,406 INFO L125 PetriNetUnfolderBase]: For 1741/1741 co-relation queries the response was YES. [2024-06-04 16:15:08,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3955 conditions, 1260 events. 747/1260 cut-off events. For 1741/1741 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6343 event pairs, 202 based on Foata normal form. 6/1263 useless extension candidates. Maximal degree in co-relation 3932. Up to 1044 conditions per place. [2024-06-04 16:15:08,413 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 22 changer transitions 0/91 dead transitions. [2024-06-04 16:15:08,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 555 flow [2024-06-04 16:15:08,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 16:15:08,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-04 16:15:08,415 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 239 flow. Second operand 7 states and 174 transitions. [2024-06-04 16:15:08,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 555 flow [2024-06-04 16:15:08,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 91 transitions, 530 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:08,423 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 349 flow [2024-06-04 16:15:08,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=349, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2024-06-04 16:15:08,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-04 16:15:08,425 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 349 flow [2024-06-04 16:15:08,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:08,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:08,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:15:08,426 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:08,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1041915370, now seen corresponding path program 2 times [2024-06-04 16:15:08,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:08,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787175876] [2024-06-04 16:15:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:08,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:08,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:08,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787175876] [2024-06-04 16:15:08,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787175876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:08,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:08,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:08,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625833236] [2024-06-04 16:15:08,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:08,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:08,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:08,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:08,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 349 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:08,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:08,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:08,952 INFO L124 PetriNetUnfolderBase]: 739/1235 cut-off events. [2024-06-04 16:15:08,952 INFO L125 PetriNetUnfolderBase]: For 2714/2714 co-relation queries the response was YES. [2024-06-04 16:15:08,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4458 conditions, 1235 events. 739/1235 cut-off events. For 2714/2714 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6172 event pairs, 222 based on Foata normal form. 3/1229 useless extension candidates. Maximal degree in co-relation 4432. Up to 1036 conditions per place. [2024-06-04 16:15:08,959 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 49 selfloop transitions, 21 changer transitions 0/77 dead transitions. [2024-06-04 16:15:08,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 535 flow [2024-06-04 16:15:08,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-04 16:15:08,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-04 16:15:08,960 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 349 flow. Second operand 5 states and 127 transitions. [2024-06-04 16:15:08,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 535 flow [2024-06-04 16:15:08,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 483 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:08,967 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 348 flow [2024-06-04 16:15:08,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-06-04 16:15:08,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-04 16:15:08,969 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 348 flow [2024-06-04 16:15:08,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:08,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:08,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:15:08,970 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:08,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 515517328, now seen corresponding path program 1 times [2024-06-04 16:15:08,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:08,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224284445] [2024-06-04 16:15:08,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:08,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:09,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:09,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224284445] [2024-06-04 16:15:09,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224284445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:09,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:09,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:09,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015260287] [2024-06-04 16:15:09,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:09,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:09,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:09,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:09,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:15:09,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 348 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:09,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:09,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:15:09,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:09,512 INFO L124 PetriNetUnfolderBase]: 718/1234 cut-off events. [2024-06-04 16:15:09,513 INFO L125 PetriNetUnfolderBase]: For 3453/3453 co-relation queries the response was YES. [2024-06-04 16:15:09,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4389 conditions, 1234 events. 718/1234 cut-off events. For 3453/3453 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6395 event pairs, 178 based on Foata normal form. 13/1220 useless extension candidates. Maximal degree in co-relation 4363. Up to 992 conditions per place. [2024-06-04 16:15:09,520 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 54 selfloop transitions, 14 changer transitions 0/83 dead transitions. [2024-06-04 16:15:09,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 560 flow [2024-06-04 16:15:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-04 16:15:09,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-04 16:15:09,521 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 348 flow. Second operand 5 states and 129 transitions. [2024-06-04 16:15:09,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 560 flow [2024-06-04 16:15:09,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 83 transitions, 518 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:09,525 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 361 flow [2024-06-04 16:15:09,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2024-06-04 16:15:09,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-04 16:15:09,525 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 361 flow [2024-06-04 16:15:09,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:09,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:09,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:09,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:15:09,526 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:09,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:09,527 INFO L85 PathProgramCache]: Analyzing trace with hash -633572751, now seen corresponding path program 1 times [2024-06-04 16:15:09,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:09,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137787611] [2024-06-04 16:15:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:09,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:09,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:09,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137787611] [2024-06-04 16:15:09,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137787611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:09,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:09,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:09,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584412427] [2024-06-04 16:15:09,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:09,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:09,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:09,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:09,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:09,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 361 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:09,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:09,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:09,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:10,046 INFO L124 PetriNetUnfolderBase]: 791/1340 cut-off events. [2024-06-04 16:15:10,046 INFO L125 PetriNetUnfolderBase]: For 3875/3875 co-relation queries the response was YES. [2024-06-04 16:15:10,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4913 conditions, 1340 events. 791/1340 cut-off events. For 3875/3875 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6849 event pairs, 209 based on Foata normal form. 3/1340 useless extension candidates. Maximal degree in co-relation 4886. Up to 1087 conditions per place. [2024-06-04 16:15:10,054 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 29 changer transitions 0/105 dead transitions. [2024-06-04 16:15:10,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 105 transitions, 741 flow [2024-06-04 16:15:10,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 16:15:10,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-04 16:15:10,056 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 361 flow. Second operand 8 states and 197 transitions. [2024-06-04 16:15:10,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 105 transitions, 741 flow [2024-06-04 16:15:10,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 714 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:10,061 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 475 flow [2024-06-04 16:15:10,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=475, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-06-04 16:15:10,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-04 16:15:10,061 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 475 flow [2024-06-04 16:15:10,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:10,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:10,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:15:10,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:10,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:10,063 INFO L85 PathProgramCache]: Analyzing trace with hash -628924177, now seen corresponding path program 1 times [2024-06-04 16:15:10,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:10,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147229421] [2024-06-04 16:15:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:10,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:10,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:10,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147229421] [2024-06-04 16:15:10,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147229421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:10,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:10,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:10,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368624056] [2024-06-04 16:15:10,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:10,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:10,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:10,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:10,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:10,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:10,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 475 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:10,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:10,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:10,677 INFO L124 PetriNetUnfolderBase]: 902/1517 cut-off events. [2024-06-04 16:15:10,677 INFO L125 PetriNetUnfolderBase]: For 6778/6778 co-relation queries the response was YES. [2024-06-04 16:15:10,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6069 conditions, 1517 events. 902/1517 cut-off events. For 6778/6778 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7907 event pairs, 215 based on Foata normal form. 30/1540 useless extension candidates. Maximal degree in co-relation 6040. Up to 1147 conditions per place. [2024-06-04 16:15:10,686 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 78 selfloop transitions, 25 changer transitions 0/110 dead transitions. [2024-06-04 16:15:10,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 110 transitions, 831 flow [2024-06-04 16:15:10,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:10,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 16:15:10,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-04 16:15:10,688 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 475 flow. Second operand 8 states and 197 transitions. [2024-06-04 16:15:10,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 110 transitions, 831 flow [2024-06-04 16:15:10,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 110 transitions, 789 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:10,696 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 524 flow [2024-06-04 16:15:10,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=524, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-04 16:15:10,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-04 16:15:10,698 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 524 flow [2024-06-04 16:15:10,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:10,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:10,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:15:10,698 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:10,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:10,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1482358223, now seen corresponding path program 2 times [2024-06-04 16:15:10,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:10,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150693537] [2024-06-04 16:15:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:10,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:11,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:11,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150693537] [2024-06-04 16:15:11,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150693537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:11,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:11,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:11,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354591396] [2024-06-04 16:15:11,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:11,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:11,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:11,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 524 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:11,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:11,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:11,227 INFO L124 PetriNetUnfolderBase]: 894/1496 cut-off events. [2024-06-04 16:15:11,228 INFO L125 PetriNetUnfolderBase]: For 6941/6941 co-relation queries the response was YES. [2024-06-04 16:15:11,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6379 conditions, 1496 events. 894/1496 cut-off events. For 6941/6941 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7775 event pairs, 243 based on Foata normal form. 3/1490 useless extension candidates. Maximal degree in co-relation 6348. Up to 1260 conditions per place. [2024-06-04 16:15:11,239 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 28 changer transitions 0/94 dead transitions. [2024-06-04 16:15:11,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 762 flow [2024-06-04 16:15:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:15:11,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-04 16:15:11,240 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 524 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:15:11,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 762 flow [2024-06-04 16:15:11,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 94 transitions, 689 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:11,250 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 518 flow [2024-06-04 16:15:11,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=518, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-04 16:15:11,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-04 16:15:11,251 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 518 flow [2024-06-04 16:15:11,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:11,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:11,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:15:11,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:11,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:11,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1482365167, now seen corresponding path program 2 times [2024-06-04 16:15:11,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:11,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945429669] [2024-06-04 16:15:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:11,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:11,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:11,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945429669] [2024-06-04 16:15:11,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945429669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:11,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:11,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:11,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402603880] [2024-06-04 16:15:11,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:11,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:11,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:11,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:11,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:11,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:11,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 518 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:11,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:11,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:11,789 INFO L124 PetriNetUnfolderBase]: 919/1545 cut-off events. [2024-06-04 16:15:11,789 INFO L125 PetriNetUnfolderBase]: For 7368/7368 co-relation queries the response was YES. [2024-06-04 16:15:11,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6469 conditions, 1545 events. 919/1545 cut-off events. For 7368/7368 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8099 event pairs, 248 based on Foata normal form. 6/1542 useless extension candidates. Maximal degree in co-relation 6437. Up to 1299 conditions per place. [2024-06-04 16:15:11,797 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 67 selfloop transitions, 24 changer transitions 0/98 dead transitions. [2024-06-04 16:15:11,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 98 transitions, 794 flow [2024-06-04 16:15:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:15:11,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-04 16:15:11,798 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 518 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:15:11,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 98 transitions, 794 flow [2024-06-04 16:15:11,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 724 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:11,809 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 540 flow [2024-06-04 16:15:11,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=540, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2024-06-04 16:15:11,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-04 16:15:11,810 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 540 flow [2024-06-04 16:15:11,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:11,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:11,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:15:11,811 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:11,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:11,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1482604177, now seen corresponding path program 3 times [2024-06-04 16:15:11,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:11,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667754297] [2024-06-04 16:15:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:11,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:12,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:12,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667754297] [2024-06-04 16:15:12,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667754297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:12,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:12,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:12,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291810774] [2024-06-04 16:15:12,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:12,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:12,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:12,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:12,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:12,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 540 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:12,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:12,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:12,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:12,339 INFO L124 PetriNetUnfolderBase]: 919/1545 cut-off events. [2024-06-04 16:15:12,339 INFO L125 PetriNetUnfolderBase]: For 8568/8568 co-relation queries the response was YES. [2024-06-04 16:15:12,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6659 conditions, 1545 events. 919/1545 cut-off events. For 8568/8568 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8091 event pairs, 199 based on Foata normal form. 6/1542 useless extension candidates. Maximal degree in co-relation 6627. Up to 1096 conditions per place. [2024-06-04 16:15:12,353 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 68 selfloop transitions, 32 changer transitions 0/107 dead transitions. [2024-06-04 16:15:12,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 882 flow [2024-06-04 16:15:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 16:15:12,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-04 16:15:12,355 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 540 flow. Second operand 6 states and 153 transitions. [2024-06-04 16:15:12,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 882 flow [2024-06-04 16:15:12,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 107 transitions, 814 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:12,364 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 621 flow [2024-06-04 16:15:12,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=621, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-04 16:15:12,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-04 16:15:12,365 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 621 flow [2024-06-04 16:15:12,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:12,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:12,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:12,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:15:12,366 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:12,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:12,366 INFO L85 PathProgramCache]: Analyzing trace with hash 801699734, now seen corresponding path program 1 times [2024-06-04 16:15:12,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:12,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370589252] [2024-06-04 16:15:12,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:12,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:12,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:12,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370589252] [2024-06-04 16:15:12,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370589252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:12,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:12,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:12,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177138836] [2024-06-04 16:15:12,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:12,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:12,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:12,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:12,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:12,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:15:12,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 621 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-04 16:15:12,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:12,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:15:12,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:13,029 INFO L124 PetriNetUnfolderBase]: 863/1486 cut-off events. [2024-06-04 16:15:13,030 INFO L125 PetriNetUnfolderBase]: For 10342/10342 co-relation queries the response was YES. [2024-06-04 16:15:13,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6744 conditions, 1486 events. 863/1486 cut-off events. For 10342/10342 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8007 event pairs, 207 based on Foata normal form. 2/1454 useless extension candidates. Maximal degree in co-relation 6710. Up to 1254 conditions per place. [2024-06-04 16:15:13,037 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 62 selfloop transitions, 15 changer transitions 0/98 dead transitions. [2024-06-04 16:15:13,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 98 transitions, 845 flow [2024-06-04 16:15:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:13,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-04 16:15:13,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-04 16:15:13,039 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 621 flow. Second operand 5 states and 122 transitions. [2024-06-04 16:15:13,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 98 transitions, 845 flow [2024-06-04 16:15:13,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 98 transitions, 788 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:13,051 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 628 flow [2024-06-04 16:15:13,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=628, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-06-04 16:15:13,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-04 16:15:13,052 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 628 flow [2024-06-04 16:15:13,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 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) [2024-06-04 16:15:13,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:13,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:13,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:15:13,052 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:13,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:13,053 INFO L85 PathProgramCache]: Analyzing trace with hash 903821038, now seen corresponding path program 1 times [2024-06-04 16:15:13,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:13,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053897176] [2024-06-04 16:15:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:13,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:13,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:13,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053897176] [2024-06-04 16:15:13,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053897176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:13,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:13,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:13,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205602355] [2024-06-04 16:15:13,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:13,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:13,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:13,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:13,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:13,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:13,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 628 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:13,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:13,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:13,657 INFO L124 PetriNetUnfolderBase]: 982/1653 cut-off events. [2024-06-04 16:15:13,658 INFO L125 PetriNetUnfolderBase]: For 12509/12509 co-relation queries the response was YES. [2024-06-04 16:15:13,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7654 conditions, 1653 events. 982/1653 cut-off events. For 12509/12509 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8720 event pairs, 158 based on Foata normal form. 18/1666 useless extension candidates. Maximal degree in co-relation 7618. Up to 1213 conditions per place. [2024-06-04 16:15:13,667 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 110 selfloop transitions, 21 changer transitions 0/138 dead transitions. [2024-06-04 16:15:13,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 138 transitions, 1168 flow [2024-06-04 16:15:13,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 16:15:13,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-04 16:15:13,669 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 628 flow. Second operand 8 states and 199 transitions. [2024-06-04 16:15:13,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 138 transitions, 1168 flow [2024-06-04 16:15:13,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 138 transitions, 1130 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:13,681 INFO L231 Difference]: Finished difference. Result has 85 places, 95 transitions, 776 flow [2024-06-04 16:15:13,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=776, PETRI_PLACES=85, PETRI_TRANSITIONS=95} [2024-06-04 16:15:13,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-04 16:15:13,682 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 95 transitions, 776 flow [2024-06-04 16:15:13,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:13,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:13,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:15:13,682 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:13,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:13,683 INFO L85 PathProgramCache]: Analyzing trace with hash 894681966, now seen corresponding path program 2 times [2024-06-04 16:15:13,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:13,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683894526] [2024-06-04 16:15:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:13,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:13,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:13,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683894526] [2024-06-04 16:15:13,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683894526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:13,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:13,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:13,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210373062] [2024-06-04 16:15:13,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:13,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:13,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:13,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:14,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:14,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 95 transitions, 776 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:14,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:14,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:14,299 INFO L124 PetriNetUnfolderBase]: 1068/1815 cut-off events. [2024-06-04 16:15:14,299 INFO L125 PetriNetUnfolderBase]: For 15944/15944 co-relation queries the response was YES. [2024-06-04 16:15:14,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8742 conditions, 1815 events. 1068/1815 cut-off events. For 15944/15944 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9863 event pairs, 265 based on Foata normal form. 24/1836 useless extension candidates. Maximal degree in co-relation 8703. Up to 1424 conditions per place. [2024-06-04 16:15:14,309 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 34 changer transitions 0/137 dead transitions. [2024-06-04 16:15:14,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 137 transitions, 1226 flow [2024-06-04 16:15:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-04 16:15:14,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 16:15:14,311 INFO L175 Difference]: Start difference. First operand has 85 places, 95 transitions, 776 flow. Second operand 9 states and 219 transitions. [2024-06-04 16:15:14,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 137 transitions, 1226 flow [2024-06-04 16:15:14,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 137 transitions, 1168 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:14,330 INFO L231 Difference]: Finished difference. Result has 90 places, 97 transitions, 836 flow [2024-06-04 16:15:14,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=836, PETRI_PLACES=90, PETRI_TRANSITIONS=97} [2024-06-04 16:15:14,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-04 16:15:14,330 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 97 transitions, 836 flow [2024-06-04 16:15:14,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:14,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:14,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:15:14,331 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:14,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:14,332 INFO L85 PathProgramCache]: Analyzing trace with hash 901353166, now seen corresponding path program 1 times [2024-06-04 16:15:14,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:14,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738755932] [2024-06-04 16:15:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:14,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:14,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:14,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738755932] [2024-06-04 16:15:14,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738755932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:14,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:14,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:14,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482178097] [2024-06-04 16:15:14,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:14,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:14,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:14,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:14,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:14,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:14,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 97 transitions, 836 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:14,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:14,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:14,916 INFO L124 PetriNetUnfolderBase]: 1129/1928 cut-off events. [2024-06-04 16:15:14,916 INFO L125 PetriNetUnfolderBase]: For 18864/18864 co-relation queries the response was YES. [2024-06-04 16:15:14,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9355 conditions, 1928 events. 1129/1928 cut-off events. For 18864/18864 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10711 event pairs, 257 based on Foata normal form. 18/1939 useless extension candidates. Maximal degree in co-relation 9315. Up to 1286 conditions per place. [2024-06-04 16:15:14,927 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 95 selfloop transitions, 40 changer transitions 0/142 dead transitions. [2024-06-04 16:15:14,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 142 transitions, 1316 flow [2024-06-04 16:15:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-04 16:15:14,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-04 16:15:14,929 INFO L175 Difference]: Start difference. First operand has 90 places, 97 transitions, 836 flow. Second operand 9 states and 221 transitions. [2024-06-04 16:15:14,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 142 transitions, 1316 flow [2024-06-04 16:15:14,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 142 transitions, 1226 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:14,951 INFO L231 Difference]: Finished difference. Result has 92 places, 99 transitions, 879 flow [2024-06-04 16:15:14,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=879, PETRI_PLACES=92, PETRI_TRANSITIONS=99} [2024-06-04 16:15:14,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-04 16:15:14,952 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 99 transitions, 879 flow [2024-06-04 16:15:14,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:14,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:14,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:15:14,953 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:14,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:14,953 INFO L85 PathProgramCache]: Analyzing trace with hash 9294092, now seen corresponding path program 1 times [2024-06-04 16:15:14,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:14,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122538989] [2024-06-04 16:15:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:14,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:15,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:15,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122538989] [2024-06-04 16:15:15,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122538989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:15,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:15,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:15,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015665] [2024-06-04 16:15:15,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:15,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:15,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:15,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:15,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:15,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:15:15,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 99 transitions, 879 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:15,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:15:15,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:15,448 INFO L124 PetriNetUnfolderBase]: 1059/1846 cut-off events. [2024-06-04 16:15:15,449 INFO L125 PetriNetUnfolderBase]: For 17901/17901 co-relation queries the response was YES. [2024-06-04 16:15:15,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9035 conditions, 1846 events. 1059/1846 cut-off events. For 17901/17901 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10435 event pairs, 274 based on Foata normal form. 2/1825 useless extension candidates. Maximal degree in co-relation 8994. Up to 1575 conditions per place. [2024-06-04 16:15:15,459 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 92 selfloop transitions, 17 changer transitions 0/123 dead transitions. [2024-06-04 16:15:15,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 123 transitions, 1269 flow [2024-06-04 16:15:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:15,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-04 16:15:15,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-04 16:15:15,461 INFO L175 Difference]: Start difference. First operand has 92 places, 99 transitions, 879 flow. Second operand 5 states and 128 transitions. [2024-06-04 16:15:15,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 123 transitions, 1269 flow [2024-06-04 16:15:15,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 123 transitions, 1158 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:15,479 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 863 flow [2024-06-04 16:15:15,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=863, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2024-06-04 16:15:15,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-04 16:15:15,480 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 863 flow [2024-06-04 16:15:15,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:15,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:15,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:15:15,480 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:15,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:15,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1382863122, now seen corresponding path program 3 times [2024-06-04 16:15:15,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:15,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520665953] [2024-06-04 16:15:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:15,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:15,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:15,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520665953] [2024-06-04 16:15:15,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520665953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:15,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:15,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:15,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476686256] [2024-06-04 16:15:15,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:15,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:15,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:15,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:15,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:15,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:15,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 863 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:15,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:15,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:16,035 INFO L124 PetriNetUnfolderBase]: 1200/2039 cut-off events. [2024-06-04 16:15:16,036 INFO L125 PetriNetUnfolderBase]: For 22312/22312 co-relation queries the response was YES. [2024-06-04 16:15:16,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9865 conditions, 2039 events. 1200/2039 cut-off events. For 22312/22312 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11451 event pairs, 317 based on Foata normal form. 24/2054 useless extension candidates. Maximal degree in co-relation 9823. Up to 1644 conditions per place. [2024-06-04 16:15:16,048 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 95 selfloop transitions, 33 changer transitions 0/135 dead transitions. [2024-06-04 16:15:16,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 135 transitions, 1273 flow [2024-06-04 16:15:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:16,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:15:16,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-04 16:15:16,049 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 863 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:15:16,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 135 transitions, 1273 flow [2024-06-04 16:15:16,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 135 transitions, 1249 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-04 16:15:16,076 INFO L231 Difference]: Finished difference. Result has 96 places, 107 transitions, 963 flow [2024-06-04 16:15:16,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=963, PETRI_PLACES=96, PETRI_TRANSITIONS=107} [2024-06-04 16:15:16,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-04 16:15:16,077 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 107 transitions, 963 flow [2024-06-04 16:15:16,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:16,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:16,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:16,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:15:16,078 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:16,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:16,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1382678672, now seen corresponding path program 2 times [2024-06-04 16:15:16,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:16,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038216434] [2024-06-04 16:15:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:16,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:16,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:16,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038216434] [2024-06-04 16:15:16,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038216434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:16,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:16,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:16,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642681935] [2024-06-04 16:15:16,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:16,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:16,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:16,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:16,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:16,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:16,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 107 transitions, 963 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:16,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:16,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:16,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:16,683 INFO L124 PetriNetUnfolderBase]: 1261/2151 cut-off events. [2024-06-04 16:15:16,684 INFO L125 PetriNetUnfolderBase]: For 25846/25846 co-relation queries the response was YES. [2024-06-04 16:15:16,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10750 conditions, 2151 events. 1261/2151 cut-off events. For 25846/25846 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12264 event pairs, 317 based on Foata normal form. 18/2160 useless extension candidates. Maximal degree in co-relation 10706. Up to 1630 conditions per place. [2024-06-04 16:15:16,697 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 37 changer transitions 0/140 dead transitions. [2024-06-04 16:15:16,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 140 transitions, 1403 flow [2024-06-04 16:15:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:15:16,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-04 16:15:16,698 INFO L175 Difference]: Start difference. First operand has 96 places, 107 transitions, 963 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:15:16,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 140 transitions, 1403 flow [2024-06-04 16:15:16,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 140 transitions, 1307 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:16,722 INFO L231 Difference]: Finished difference. Result has 98 places, 109 transitions, 1002 flow [2024-06-04 16:15:16,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1002, PETRI_PLACES=98, PETRI_TRANSITIONS=109} [2024-06-04 16:15:16,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-04 16:15:16,723 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 109 transitions, 1002 flow [2024-06-04 16:15:16,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:16,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:16,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:16,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:15:16,724 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:16,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1729510834, now seen corresponding path program 3 times [2024-06-04 16:15:16,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:16,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317101098] [2024-06-04 16:15:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:16,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:16,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:16,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317101098] [2024-06-04 16:15:16,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317101098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:16,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:16,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:16,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927950237] [2024-06-04 16:15:16,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:16,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:16,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:16,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:16,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:17,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:17,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 109 transitions, 1002 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:17,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:17,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:17,328 INFO L124 PetriNetUnfolderBase]: 1261/2167 cut-off events. [2024-06-04 16:15:17,328 INFO L125 PetriNetUnfolderBase]: For 25211/25211 co-relation queries the response was YES. [2024-06-04 16:15:17,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10556 conditions, 2167 events. 1261/2167 cut-off events. For 25211/25211 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12445 event pairs, 260 based on Foata normal form. 18/2176 useless extension candidates. Maximal degree in co-relation 10511. Up to 1117 conditions per place. [2024-06-04 16:15:17,340 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 83 selfloop transitions, 51 changer transitions 0/141 dead transitions. [2024-06-04 16:15:17,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 141 transitions, 1386 flow [2024-06-04 16:15:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 16:15:17,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:15:17,341 INFO L175 Difference]: Start difference. First operand has 98 places, 109 transitions, 1002 flow. Second operand 7 states and 175 transitions. [2024-06-04 16:15:17,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 141 transitions, 1386 flow [2024-06-04 16:15:17,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 141 transitions, 1273 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:17,362 INFO L231 Difference]: Finished difference. Result has 99 places, 110 transitions, 1018 flow [2024-06-04 16:15:17,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1018, PETRI_PLACES=99, PETRI_TRANSITIONS=110} [2024-06-04 16:15:17,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-04 16:15:17,362 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 110 transitions, 1018 flow [2024-06-04 16:15:17,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:17,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:17,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:15:17,364 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:17,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:17,364 INFO L85 PathProgramCache]: Analyzing trace with hash 9709802, now seen corresponding path program 2 times [2024-06-04 16:15:17,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:17,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826256856] [2024-06-04 16:15:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:17,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:17,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:17,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826256856] [2024-06-04 16:15:17,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826256856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:17,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:17,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:17,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589816639] [2024-06-04 16:15:17,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:17,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:17,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:17,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:17,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:17,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:15:17,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 110 transitions, 1018 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:17,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:15:17,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:17,928 INFO L124 PetriNetUnfolderBase]: 1163/2032 cut-off events. [2024-06-04 16:15:17,929 INFO L125 PetriNetUnfolderBase]: For 22627/22627 co-relation queries the response was YES. [2024-06-04 16:15:17,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9999 conditions, 2032 events. 1163/2032 cut-off events. For 22627/22627 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11717 event pairs, 289 based on Foata normal form. 2/1998 useless extension candidates. Maximal degree in co-relation 9953. Up to 1761 conditions per place. [2024-06-04 16:15:17,942 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 97 selfloop transitions, 14 changer transitions 0/125 dead transitions. [2024-06-04 16:15:17,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 125 transitions, 1308 flow [2024-06-04 16:15:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-04 16:15:17,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524390243902439 [2024-06-04 16:15:17,944 INFO L175 Difference]: Start difference. First operand has 99 places, 110 transitions, 1018 flow. Second operand 4 states and 107 transitions. [2024-06-04 16:15:17,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 125 transitions, 1308 flow [2024-06-04 16:15:17,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 125 transitions, 1155 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:17,972 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 905 flow [2024-06-04 16:15:17,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=905, PETRI_PLACES=98, PETRI_TRANSITIONS=110} [2024-06-04 16:15:17,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-04 16:15:17,973 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 905 flow [2024-06-04 16:15:17,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:17,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:17,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:15:17,974 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:17,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:17,974 INFO L85 PathProgramCache]: Analyzing trace with hash 9724682, now seen corresponding path program 1 times [2024-06-04 16:15:17,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:17,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022794699] [2024-06-04 16:15:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:17,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:18,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:18,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022794699] [2024-06-04 16:15:18,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022794699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:18,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:18,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:18,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861194859] [2024-06-04 16:15:18,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:18,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:18,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:18,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:18,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:18,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:15:18,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 110 transitions, 905 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:18,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:18,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:15:18,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:18,503 INFO L124 PetriNetUnfolderBase]: 1154/2021 cut-off events. [2024-06-04 16:15:18,503 INFO L125 PetriNetUnfolderBase]: For 20892/20892 co-relation queries the response was YES. [2024-06-04 16:15:18,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9447 conditions, 2021 events. 1154/2021 cut-off events. For 20892/20892 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11659 event pairs, 288 based on Foata normal form. 2/1987 useless extension candidates. Maximal degree in co-relation 9400. Up to 1771 conditions per place. [2024-06-04 16:15:18,515 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 100 selfloop transitions, 8 changer transitions 0/122 dead transitions. [2024-06-04 16:15:18,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 122 transitions, 1195 flow [2024-06-04 16:15:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:18,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-04 16:15:18,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-04 16:15:18,517 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 905 flow. Second operand 4 states and 99 transitions. [2024-06-04 16:15:18,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 122 transitions, 1195 flow [2024-06-04 16:15:18,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 122 transitions, 1167 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:18,540 INFO L231 Difference]: Finished difference. Result has 99 places, 112 transitions, 922 flow [2024-06-04 16:15:18,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=922, PETRI_PLACES=99, PETRI_TRANSITIONS=112} [2024-06-04 16:15:18,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-04 16:15:18,541 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 112 transitions, 922 flow [2024-06-04 16:15:18,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:18,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:18,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:18,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:15:18,541 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:18,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:18,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1637431395, now seen corresponding path program 1 times [2024-06-04 16:15:18,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:18,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56971083] [2024-06-04 16:15:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:18,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:18,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:18,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56971083] [2024-06-04 16:15:18,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56971083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:18,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:18,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:18,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159059594] [2024-06-04 16:15:18,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:18,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:18,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:18,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:18,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:18,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 922 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) [2024-06-04 16:15:18,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:18,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:18,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:19,142 INFO L124 PetriNetUnfolderBase]: 1260/2166 cut-off events. [2024-06-04 16:15:19,142 INFO L125 PetriNetUnfolderBase]: For 22945/22945 co-relation queries the response was YES. [2024-06-04 16:15:19,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10211 conditions, 2166 events. 1260/2166 cut-off events. For 22945/22945 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12414 event pairs, 308 based on Foata normal form. 2/2165 useless extension candidates. Maximal degree in co-relation 10163. Up to 1879 conditions per place. [2024-06-04 16:15:19,153 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 111 selfloop transitions, 33 changer transitions 0/151 dead transitions. [2024-06-04 16:15:19,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 151 transitions, 1496 flow [2024-06-04 16:15:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 16:15:19,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-04 16:15:19,155 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 922 flow. Second operand 8 states and 190 transitions. [2024-06-04 16:15:19,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 151 transitions, 1496 flow [2024-06-04 16:15:19,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 151 transitions, 1467 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:19,181 INFO L231 Difference]: Finished difference. Result has 106 places, 122 transitions, 1126 flow [2024-06-04 16:15:19,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1126, PETRI_PLACES=106, PETRI_TRANSITIONS=122} [2024-06-04 16:15:19,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-04 16:15:19,182 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 122 transitions, 1126 flow [2024-06-04 16:15:19,182 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) [2024-06-04 16:15:19,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:19,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:19,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:15:19,182 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:19,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1464941505, now seen corresponding path program 2 times [2024-06-04 16:15:19,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:19,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681219520] [2024-06-04 16:15:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:19,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:19,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:19,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681219520] [2024-06-04 16:15:19,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681219520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:19,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:19,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:19,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010731601] [2024-06-04 16:15:19,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:19,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:19,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:19,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:19,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:19,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:19,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 122 transitions, 1126 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) [2024-06-04 16:15:19,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:19,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:19,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:19,795 INFO L124 PetriNetUnfolderBase]: 1265/2161 cut-off events. [2024-06-04 16:15:19,795 INFO L125 PetriNetUnfolderBase]: For 26127/26127 co-relation queries the response was YES. [2024-06-04 16:15:19,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10767 conditions, 2161 events. 1265/2161 cut-off events. For 26127/26127 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12353 event pairs, 328 based on Foata normal form. 1/2153 useless extension candidates. Maximal degree in co-relation 10717. Up to 1885 conditions per place. [2024-06-04 16:15:19,806 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 101 selfloop transitions, 34 changer transitions 0/142 dead transitions. [2024-06-04 16:15:19,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 142 transitions, 1536 flow [2024-06-04 16:15:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 16:15:19,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:15:19,808 INFO L175 Difference]: Start difference. First operand has 106 places, 122 transitions, 1126 flow. Second operand 6 states and 144 transitions. [2024-06-04 16:15:19,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 142 transitions, 1536 flow [2024-06-04 16:15:19,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 142 transitions, 1450 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:19,833 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 1166 flow [2024-06-04 16:15:19,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1166, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2024-06-04 16:15:19,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-04 16:15:19,834 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 1166 flow [2024-06-04 16:15:19,834 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) [2024-06-04 16:15:19,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:19,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:19,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:15:19,835 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:19,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:19,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1792845011, now seen corresponding path program 3 times [2024-06-04 16:15:19,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:19,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638188767] [2024-06-04 16:15:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:19,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:20,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:20,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638188767] [2024-06-04 16:15:20,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638188767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:20,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:20,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:20,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388314321] [2024-06-04 16:15:20,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:20,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:20,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:20,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:20,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:20,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:20,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 1166 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) [2024-06-04 16:15:20,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:20,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:20,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:20,398 INFO L124 PetriNetUnfolderBase]: 1262/2157 cut-off events. [2024-06-04 16:15:20,399 INFO L125 PetriNetUnfolderBase]: For 27162/27162 co-relation queries the response was YES. [2024-06-04 16:15:20,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10799 conditions, 2157 events. 1262/2157 cut-off events. For 27162/27162 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12328 event pairs, 328 based on Foata normal form. 1/2149 useless extension candidates. Maximal degree in co-relation 10747. Up to 1882 conditions per place. [2024-06-04 16:15:20,412 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 95 selfloop transitions, 36 changer transitions 0/138 dead transitions. [2024-06-04 16:15:20,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 138 transitions, 1460 flow [2024-06-04 16:15:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:20,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 16:15:20,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 16:15:20,414 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 1166 flow. Second operand 6 states and 141 transitions. [2024-06-04 16:15:20,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 138 transitions, 1460 flow [2024-06-04 16:15:20,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 138 transitions, 1326 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:20,449 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 1110 flow [2024-06-04 16:15:20,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1110, PETRI_PLACES=111, PETRI_TRANSITIONS=125} [2024-06-04 16:15:20,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-04 16:15:20,449 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 1110 flow [2024-06-04 16:15:20,450 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) [2024-06-04 16:15:20,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:20,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:20,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:15:20,450 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:20,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:20,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1631485717, now seen corresponding path program 1 times [2024-06-04 16:15:20,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:20,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249872693] [2024-06-04 16:15:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:20,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:20,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:20,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249872693] [2024-06-04 16:15:20,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249872693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:20,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:20,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:20,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193582298] [2024-06-04 16:15:20,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:20,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:20,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:20,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:20,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:15:20,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 1110 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:20,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:20,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:15:20,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:21,102 INFO L124 PetriNetUnfolderBase]: 1249/2202 cut-off events. [2024-06-04 16:15:21,102 INFO L125 PetriNetUnfolderBase]: For 34657/34657 co-relation queries the response was YES. [2024-06-04 16:15:21,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11124 conditions, 2202 events. 1249/2202 cut-off events. For 34657/34657 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13127 event pairs, 269 based on Foata normal form. 8/2179 useless extension candidates. Maximal degree in co-relation 11071. Up to 1711 conditions per place. [2024-06-04 16:15:21,115 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 97 selfloop transitions, 21 changer transitions 0/152 dead transitions. [2024-06-04 16:15:21,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 152 transitions, 1534 flow [2024-06-04 16:15:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:15:21,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 16:15:21,117 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 1110 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:15:21,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 152 transitions, 1534 flow [2024-06-04 16:15:21,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 152 transitions, 1449 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:21,167 INFO L231 Difference]: Finished difference. Result has 113 places, 127 transitions, 1097 flow [2024-06-04 16:15:21,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1097, PETRI_PLACES=113, PETRI_TRANSITIONS=127} [2024-06-04 16:15:21,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-04 16:15:21,167 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 127 transitions, 1097 flow [2024-06-04 16:15:21,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:21,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:21,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:21,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:15:21,168 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:21,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:21,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1591880907, now seen corresponding path program 2 times [2024-06-04 16:15:21,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:21,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466395478] [2024-06-04 16:15:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:21,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:21,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:21,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466395478] [2024-06-04 16:15:21,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466395478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:21,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:21,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:21,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717883718] [2024-06-04 16:15:21,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:21,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:21,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:21,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:21,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:15:21,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 127 transitions, 1097 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:21,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:21,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:15:21,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:21,802 INFO L124 PetriNetUnfolderBase]: 1226/2169 cut-off events. [2024-06-04 16:15:21,802 INFO L125 PetriNetUnfolderBase]: For 34678/34678 co-relation queries the response was YES. [2024-06-04 16:15:21,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10782 conditions, 2169 events. 1226/2169 cut-off events. For 34678/34678 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12930 event pairs, 294 based on Foata normal form. 10/2148 useless extension candidates. Maximal degree in co-relation 10728. Up to 1777 conditions per place. [2024-06-04 16:15:21,815 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 93 selfloop transitions, 18 changer transitions 0/145 dead transitions. [2024-06-04 16:15:21,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 145 transitions, 1409 flow [2024-06-04 16:15:21,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:15:21,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 16:15:21,816 INFO L175 Difference]: Start difference. First operand has 113 places, 127 transitions, 1097 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:15:21,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 145 transitions, 1409 flow [2024-06-04 16:15:21,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 145 transitions, 1381 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:21,861 INFO L231 Difference]: Finished difference. Result has 117 places, 127 transitions, 1111 flow [2024-06-04 16:15:21,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1111, PETRI_PLACES=117, PETRI_TRANSITIONS=127} [2024-06-04 16:15:21,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-04 16:15:21,862 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 127 transitions, 1111 flow [2024-06-04 16:15:21,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:21,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:21,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:21,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:15:21,863 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:21,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:21,863 INFO L85 PathProgramCache]: Analyzing trace with hash -517946443, now seen corresponding path program 1 times [2024-06-04 16:15:21,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:21,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276242194] [2024-06-04 16:15:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:21,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:22,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:22,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276242194] [2024-06-04 16:15:22,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276242194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:22,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:22,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:22,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658212302] [2024-06-04 16:15:22,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:22,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:22,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:22,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:22,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:22,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:22,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 127 transitions, 1111 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:22,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:22,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:22,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:22,465 INFO L124 PetriNetUnfolderBase]: 1334/2306 cut-off events. [2024-06-04 16:15:22,465 INFO L125 PetriNetUnfolderBase]: For 33340/33340 co-relation queries the response was YES. [2024-06-04 16:15:22,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11564 conditions, 2306 events. 1334/2306 cut-off events. For 33340/33340 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13458 event pairs, 313 based on Foata normal form. 2/2305 useless extension candidates. Maximal degree in co-relation 11508. Up to 1960 conditions per place. [2024-06-04 16:15:22,478 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 119 selfloop transitions, 43 changer transitions 0/169 dead transitions. [2024-06-04 16:15:22,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 169 transitions, 1785 flow [2024-06-04 16:15:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:15:22,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:15:22,480 INFO L175 Difference]: Start difference. First operand has 117 places, 127 transitions, 1111 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:15:22,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 169 transitions, 1785 flow [2024-06-04 16:15:22,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 169 transitions, 1741 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:22,521 INFO L231 Difference]: Finished difference. Result has 120 places, 139 transitions, 1309 flow [2024-06-04 16:15:22,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1309, PETRI_PLACES=120, PETRI_TRANSITIONS=139} [2024-06-04 16:15:22,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-04 16:15:22,522 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 139 transitions, 1309 flow [2024-06-04 16:15:22,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:22,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:22,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:22,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:15:22,523 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:22,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:22,523 INFO L85 PathProgramCache]: Analyzing trace with hash 779235845, now seen corresponding path program 2 times [2024-06-04 16:15:22,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:22,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711945964] [2024-06-04 16:15:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:22,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:22,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:22,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711945964] [2024-06-04 16:15:22,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711945964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:22,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:22,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:22,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412313654] [2024-06-04 16:15:22,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:22,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:22,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:22,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:22,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:22,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:22,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 139 transitions, 1309 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) [2024-06-04 16:15:22,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:22,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:22,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:23,170 INFO L124 PetriNetUnfolderBase]: 1344/2328 cut-off events. [2024-06-04 16:15:23,170 INFO L125 PetriNetUnfolderBase]: For 36800/36800 co-relation queries the response was YES. [2024-06-04 16:15:23,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12159 conditions, 2328 events. 1344/2328 cut-off events. For 36800/36800 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13641 event pairs, 315 based on Foata normal form. 2/2327 useless extension candidates. Maximal degree in co-relation 12102. Up to 1942 conditions per place. [2024-06-04 16:15:23,182 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 111 selfloop transitions, 59 changer transitions 0/177 dead transitions. [2024-06-04 16:15:23,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 177 transitions, 1961 flow [2024-06-04 16:15:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:23,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-04 16:15:23,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-04 16:15:23,184 INFO L175 Difference]: Start difference. First operand has 120 places, 139 transitions, 1309 flow. Second operand 9 states and 215 transitions. [2024-06-04 16:15:23,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 177 transitions, 1961 flow [2024-06-04 16:15:23,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 177 transitions, 1903 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:23,243 INFO L231 Difference]: Finished difference. Result has 127 places, 146 transitions, 1478 flow [2024-06-04 16:15:23,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1478, PETRI_PLACES=127, PETRI_TRANSITIONS=146} [2024-06-04 16:15:23,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-04 16:15:23,245 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 146 transitions, 1478 flow [2024-06-04 16:15:23,245 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) [2024-06-04 16:15:23,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:23,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:23,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:15:23,246 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:23,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:23,246 INFO L85 PathProgramCache]: Analyzing trace with hash 341730123, now seen corresponding path program 3 times [2024-06-04 16:15:23,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:23,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179278453] [2024-06-04 16:15:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:23,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:23,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:23,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179278453] [2024-06-04 16:15:23,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179278453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:23,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:23,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:23,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521385515] [2024-06-04 16:15:23,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:23,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:23,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:23,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:23,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:23,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:23,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 146 transitions, 1478 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:23,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:23,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:23,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:23,837 INFO L124 PetriNetUnfolderBase]: 1362/2359 cut-off events. [2024-06-04 16:15:23,838 INFO L125 PetriNetUnfolderBase]: For 41615/41615 co-relation queries the response was YES. [2024-06-04 16:15:23,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12926 conditions, 2359 events. 1362/2359 cut-off events. For 41615/41615 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13839 event pairs, 315 based on Foata normal form. 2/2358 useless extension candidates. Maximal degree in co-relation 12867. Up to 1995 conditions per place. [2024-06-04 16:15:23,851 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 122 selfloop transitions, 53 changer transitions 0/182 dead transitions. [2024-06-04 16:15:23,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 182 transitions, 2158 flow [2024-06-04 16:15:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:23,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 16:15:23,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-04 16:15:23,853 INFO L175 Difference]: Start difference. First operand has 127 places, 146 transitions, 1478 flow. Second operand 9 states and 211 transitions. [2024-06-04 16:15:23,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 182 transitions, 2158 flow [2024-06-04 16:15:23,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 182 transitions, 2053 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:23,915 INFO L231 Difference]: Finished difference. Result has 131 places, 153 transitions, 1588 flow [2024-06-04 16:15:23,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1588, PETRI_PLACES=131, PETRI_TRANSITIONS=153} [2024-06-04 16:15:23,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-04 16:15:23,915 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 153 transitions, 1588 flow [2024-06-04 16:15:23,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:23,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:23,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:23,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:15:23,916 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:23,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash 341738059, now seen corresponding path program 1 times [2024-06-04 16:15:23,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:23,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685018829] [2024-06-04 16:15:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:23,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:24,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:24,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685018829] [2024-06-04 16:15:24,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685018829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:24,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:24,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:24,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76614539] [2024-06-04 16:15:24,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:24,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:24,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:24,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:24,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:24,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:15:24,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 153 transitions, 1588 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:24,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:24,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:15:24,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:24,507 INFO L124 PetriNetUnfolderBase]: 1316/2305 cut-off events. [2024-06-04 16:15:24,507 INFO L125 PetriNetUnfolderBase]: For 46730/46730 co-relation queries the response was YES. [2024-06-04 16:15:24,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12889 conditions, 2305 events. 1316/2305 cut-off events. For 46730/46730 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13666 event pairs, 298 based on Foata normal form. 10/2290 useless extension candidates. Maximal degree in co-relation 12828. Up to 1913 conditions per place. [2024-06-04 16:15:24,521 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 132 selfloop transitions, 18 changer transitions 0/175 dead transitions. [2024-06-04 16:15:24,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 175 transitions, 2006 flow [2024-06-04 16:15:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:24,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:15:24,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:15:24,523 INFO L175 Difference]: Start difference. First operand has 131 places, 153 transitions, 1588 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:15:24,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 175 transitions, 2006 flow [2024-06-04 16:15:24,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 175 transitions, 1895 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:24,604 INFO L231 Difference]: Finished difference. Result has 132 places, 154 transitions, 1532 flow [2024-06-04 16:15:24,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1532, PETRI_PLACES=132, PETRI_TRANSITIONS=154} [2024-06-04 16:15:24,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-04 16:15:24,605 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 154 transitions, 1532 flow [2024-06-04 16:15:24,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:24,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:24,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:24,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:15:24,606 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:24,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:24,630 INFO L85 PathProgramCache]: Analyzing trace with hash 548176173, now seen corresponding path program 4 times [2024-06-04 16:15:24,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:24,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390053783] [2024-06-04 16:15:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:24,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:24,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390053783] [2024-06-04 16:15:24,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390053783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:24,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:24,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:24,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933896054] [2024-06-04 16:15:24,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:24,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:24,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:24,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:24,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 154 transitions, 1532 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:24,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:24,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:24,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:25,238 INFO L124 PetriNetUnfolderBase]: 1395/2397 cut-off events. [2024-06-04 16:15:25,238 INFO L125 PetriNetUnfolderBase]: For 45045/45045 co-relation queries the response was YES. [2024-06-04 16:15:25,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13295 conditions, 2397 events. 1395/2397 cut-off events. For 45045/45045 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14088 event pairs, 343 based on Foata normal form. 1/2389 useless extension candidates. Maximal degree in co-relation 13233. Up to 2048 conditions per place. [2024-06-04 16:15:25,253 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 47 changer transitions 0/172 dead transitions. [2024-06-04 16:15:25,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 172 transitions, 2030 flow [2024-06-04 16:15:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:15:25,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 16:15:25,254 INFO L175 Difference]: Start difference. First operand has 132 places, 154 transitions, 1532 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:15:25,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 172 transitions, 2030 flow [2024-06-04 16:15:25,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 172 transitions, 1977 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:25,319 INFO L231 Difference]: Finished difference. Result has 134 places, 154 transitions, 1579 flow [2024-06-04 16:15:25,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1579, PETRI_PLACES=134, PETRI_TRANSITIONS=154} [2024-06-04 16:15:25,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-04 16:15:25,320 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 154 transitions, 1579 flow [2024-06-04 16:15:25,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:25,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:25,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:25,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:15:25,321 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:25,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:25,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1831455139, now seen corresponding path program 5 times [2024-06-04 16:15:25,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:25,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022369499] [2024-06-04 16:15:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:25,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:25,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:25,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022369499] [2024-06-04 16:15:25,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022369499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:25,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:25,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:25,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864078686] [2024-06-04 16:15:25,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:25,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:25,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:25,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:25,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:25,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 154 transitions, 1579 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) [2024-06-04 16:15:25,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:25,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:25,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:25,929 INFO L124 PetriNetUnfolderBase]: 1400/2406 cut-off events. [2024-06-04 16:15:25,943 INFO L125 PetriNetUnfolderBase]: For 47238/47238 co-relation queries the response was YES. [2024-06-04 16:15:25,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13465 conditions, 2406 events. 1400/2406 cut-off events. For 47238/47238 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14131 event pairs, 343 based on Foata normal form. 1/2398 useless extension candidates. Maximal degree in co-relation 13402. Up to 2022 conditions per place. [2024-06-04 16:15:25,958 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 103 selfloop transitions, 66 changer transitions 0/176 dead transitions. [2024-06-04 16:15:25,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 176 transitions, 2135 flow [2024-06-04 16:15:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:15:25,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:15:25,960 INFO L175 Difference]: Start difference. First operand has 134 places, 154 transitions, 1579 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:15:25,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 176 transitions, 2135 flow [2024-06-04 16:15:26,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 176 transitions, 2033 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:26,050 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1659 flow [2024-06-04 16:15:26,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1659, PETRI_PLACES=136, PETRI_TRANSITIONS=157} [2024-06-04 16:15:26,050 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-04 16:15:26,050 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1659 flow [2024-06-04 16:15:26,051 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) [2024-06-04 16:15:26,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:26,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:26,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:15:26,051 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:26,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash 347099013, now seen corresponding path program 6 times [2024-06-04 16:15:26,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:26,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832058030] [2024-06-04 16:15:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:26,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:26,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:26,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832058030] [2024-06-04 16:15:26,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832058030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:26,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:26,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:26,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596980335] [2024-06-04 16:15:26,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:26,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:26,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:26,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:26,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:26,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:26,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 157 transitions, 1659 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:26,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:26,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:26,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:26,805 INFO L124 PetriNetUnfolderBase]: 1410/2434 cut-off events. [2024-06-04 16:15:26,805 INFO L125 PetriNetUnfolderBase]: For 49486/49486 co-relation queries the response was YES. [2024-06-04 16:15:26,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13703 conditions, 2434 events. 1410/2434 cut-off events. For 49486/49486 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14361 event pairs, 317 based on Foata normal form. 1/2432 useless extension candidates. Maximal degree in co-relation 13639. Up to 2182 conditions per place. [2024-06-04 16:15:26,821 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 151 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2024-06-04 16:15:26,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 177 transitions, 2150 flow [2024-06-04 16:15:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-04 16:15:26,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-04 16:15:26,823 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1659 flow. Second operand 6 states and 137 transitions. [2024-06-04 16:15:26,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 177 transitions, 2150 flow [2024-06-04 16:15:26,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 177 transitions, 1974 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:26,923 INFO L231 Difference]: Finished difference. Result has 137 places, 163 transitions, 1620 flow [2024-06-04 16:15:26,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1620, PETRI_PLACES=137, PETRI_TRANSITIONS=163} [2024-06-04 16:15:26,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-04 16:15:26,924 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 163 transitions, 1620 flow [2024-06-04 16:15:26,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:26,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:26,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:26,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:15:26,925 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:26,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:26,925 INFO L85 PathProgramCache]: Analyzing trace with hash -463477075, now seen corresponding path program 7 times [2024-06-04 16:15:26,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:26,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441732371] [2024-06-04 16:15:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:26,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:27,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:27,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441732371] [2024-06-04 16:15:27,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441732371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:27,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:27,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:27,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723621260] [2024-06-04 16:15:27,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:27,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:27,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:27,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:27,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:27,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:27,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 163 transitions, 1620 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) [2024-06-04 16:15:27,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:27,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:27,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:27,577 INFO L124 PetriNetUnfolderBase]: 1415/2433 cut-off events. [2024-06-04 16:15:27,577 INFO L125 PetriNetUnfolderBase]: For 51266/51266 co-relation queries the response was YES. [2024-06-04 16:15:27,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13615 conditions, 2433 events. 1415/2433 cut-off events. For 51266/51266 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14355 event pairs, 343 based on Foata normal form. 1/2425 useless extension candidates. Maximal degree in co-relation 13550. Up to 2038 conditions per place. [2024-06-04 16:15:27,593 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 100 selfloop transitions, 75 changer transitions 0/182 dead transitions. [2024-06-04 16:15:27,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 182 transitions, 2188 flow [2024-06-04 16:15:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:15:27,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-04 16:15:27,595 INFO L175 Difference]: Start difference. First operand has 137 places, 163 transitions, 1620 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:15:27,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 182 transitions, 2188 flow [2024-06-04 16:15:27,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 182 transitions, 2126 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:27,680 INFO L231 Difference]: Finished difference. Result has 141 places, 166 transitions, 1758 flow [2024-06-04 16:15:27,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1758, PETRI_PLACES=141, PETRI_TRANSITIONS=166} [2024-06-04 16:15:27,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-04 16:15:27,681 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 166 transitions, 1758 flow [2024-06-04 16:15:27,681 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) [2024-06-04 16:15:27,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:27,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:27,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:15:27,682 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:27,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1841644219, now seen corresponding path program 8 times [2024-06-04 16:15:27,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:27,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730463440] [2024-06-04 16:15:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:27,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:28,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:28,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730463440] [2024-06-04 16:15:28,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730463440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:28,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:28,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:28,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162728696] [2024-06-04 16:15:28,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:28,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:28,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:28,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:28,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:28,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:28,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 166 transitions, 1758 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) [2024-06-04 16:15:28,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:28,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:28,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:28,342 INFO L124 PetriNetUnfolderBase]: 1412/2443 cut-off events. [2024-06-04 16:15:28,343 INFO L125 PetriNetUnfolderBase]: For 53243/53243 co-relation queries the response was YES. [2024-06-04 16:15:28,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13796 conditions, 2443 events. 1412/2443 cut-off events. For 53243/53243 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14435 event pairs, 319 based on Foata normal form. 1/2441 useless extension candidates. Maximal degree in co-relation 13730. Up to 2179 conditions per place. [2024-06-04 16:15:28,357 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 150 selfloop transitions, 24 changer transitions 0/181 dead transitions. [2024-06-04 16:15:28,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 181 transitions, 2172 flow [2024-06-04 16:15:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-04 16:15:28,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-04 16:15:28,359 INFO L175 Difference]: Start difference. First operand has 141 places, 166 transitions, 1758 flow. Second operand 7 states and 155 transitions. [2024-06-04 16:15:28,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 181 transitions, 2172 flow [2024-06-04 16:15:28,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 181 transitions, 1949 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:28,458 INFO L231 Difference]: Finished difference. Result has 143 places, 166 transitions, 1589 flow [2024-06-04 16:15:28,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1589, PETRI_PLACES=143, PETRI_TRANSITIONS=166} [2024-06-04 16:15:28,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-04 16:15:28,458 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 166 transitions, 1589 flow [2024-06-04 16:15:28,458 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) [2024-06-04 16:15:28,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:28,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:28,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:15:28,459 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:28,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:28,459 INFO L85 PathProgramCache]: Analyzing trace with hash 553954263, now seen corresponding path program 9 times [2024-06-04 16:15:28,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:28,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010537184] [2024-06-04 16:15:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:28,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:28,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:28,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010537184] [2024-06-04 16:15:28,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010537184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:28,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:28,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:28,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96965315] [2024-06-04 16:15:28,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:28,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:28,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:28,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:28,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:28,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:28,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 166 transitions, 1589 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:28,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:28,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:28,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:29,110 INFO L124 PetriNetUnfolderBase]: 1419/2455 cut-off events. [2024-06-04 16:15:29,110 INFO L125 PetriNetUnfolderBase]: For 54025/54025 co-relation queries the response was YES. [2024-06-04 16:15:29,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13665 conditions, 2455 events. 1419/2455 cut-off events. For 54025/54025 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14512 event pairs, 321 based on Foata normal form. 1/2453 useless extension candidates. Maximal degree in co-relation 13598. Up to 2143 conditions per place. [2024-06-04 16:15:29,125 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 160 selfloop transitions, 39 changer transitions 0/206 dead transitions. [2024-06-04 16:15:29,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 206 transitions, 2325 flow [2024-06-04 16:15:29,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 16:15:29,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-04 16:15:29,127 INFO L175 Difference]: Start difference. First operand has 143 places, 166 transitions, 1589 flow. Second operand 7 states and 174 transitions. [2024-06-04 16:15:29,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 206 transitions, 2325 flow [2024-06-04 16:15:29,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 206 transitions, 2223 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:29,246 INFO L231 Difference]: Finished difference. Result has 144 places, 178 transitions, 1788 flow [2024-06-04 16:15:29,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1788, PETRI_PLACES=144, PETRI_TRANSITIONS=178} [2024-06-04 16:15:29,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-04 16:15:29,247 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 178 transitions, 1788 flow [2024-06-04 16:15:29,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:29,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:29,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:29,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:15:29,248 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:29,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:29,248 INFO L85 PathProgramCache]: Analyzing trace with hash 349826525, now seen corresponding path program 10 times [2024-06-04 16:15:29,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:29,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74136579] [2024-06-04 16:15:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:29,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:29,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:29,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74136579] [2024-06-04 16:15:29,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74136579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:29,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:29,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:29,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530343795] [2024-06-04 16:15:29,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:29,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:29,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:29,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:29,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:29,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:29,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 178 transitions, 1788 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:29,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:29,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:29,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:29,857 INFO L124 PetriNetUnfolderBase]: 1416/2451 cut-off events. [2024-06-04 16:15:29,858 INFO L125 PetriNetUnfolderBase]: For 55815/55815 co-relation queries the response was YES. [2024-06-04 16:15:29,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13778 conditions, 2451 events. 1416/2451 cut-off events. For 55815/55815 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14449 event pairs, 321 based on Foata normal form. 1/2449 useless extension candidates. Maximal degree in co-relation 13709. Up to 2140 conditions per place. [2024-06-04 16:15:29,874 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 155 selfloop transitions, 39 changer transitions 0/201 dead transitions. [2024-06-04 16:15:29,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 201 transitions, 2266 flow [2024-06-04 16:15:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 16:15:29,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-04 16:15:29,876 INFO L175 Difference]: Start difference. First operand has 144 places, 178 transitions, 1788 flow. Second operand 6 states and 151 transitions. [2024-06-04 16:15:29,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 201 transitions, 2266 flow [2024-06-04 16:15:29,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 201 transitions, 2135 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:29,979 INFO L231 Difference]: Finished difference. Result has 145 places, 178 transitions, 1746 flow [2024-06-04 16:15:29,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1746, PETRI_PLACES=145, PETRI_TRANSITIONS=178} [2024-06-04 16:15:29,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-04 16:15:29,980 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 178 transitions, 1746 flow [2024-06-04 16:15:29,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:29,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:29,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:29,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:15:29,980 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:29,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash 741235369, now seen corresponding path program 2 times [2024-06-04 16:15:29,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:29,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854111809] [2024-06-04 16:15:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:29,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:30,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:30,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854111809] [2024-06-04 16:15:30,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854111809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:30,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:30,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:30,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728821616] [2024-06-04 16:15:30,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:30,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:30,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:30,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:30,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:15:30,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 178 transitions, 1746 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:30,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:30,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:15:30,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:30,686 INFO L124 PetriNetUnfolderBase]: 1358/2389 cut-off events. [2024-06-04 16:15:30,687 INFO L125 PetriNetUnfolderBase]: For 59073/59073 co-relation queries the response was YES. [2024-06-04 16:15:30,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13438 conditions, 2389 events. 1358/2389 cut-off events. For 59073/59073 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14360 event pairs, 238 based on Foata normal form. 9/2371 useless extension candidates. Maximal degree in co-relation 13369. Up to 1934 conditions per place. [2024-06-04 16:15:30,705 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 148 selfloop transitions, 23 changer transitions 0/202 dead transitions. [2024-06-04 16:15:30,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 202 transitions, 2216 flow [2024-06-04 16:15:30,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-04 16:15:30,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-04 16:15:30,706 INFO L175 Difference]: Start difference. First operand has 145 places, 178 transitions, 1746 flow. Second operand 5 states and 133 transitions. [2024-06-04 16:15:30,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 202 transitions, 2216 flow [2024-06-04 16:15:30,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 202 transitions, 2138 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:30,823 INFO L231 Difference]: Finished difference. Result has 145 places, 179 transitions, 1741 flow [2024-06-04 16:15:30,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1741, PETRI_PLACES=145, PETRI_TRANSITIONS=179} [2024-06-04 16:15:30,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-04 16:15:30,824 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 179 transitions, 1741 flow [2024-06-04 16:15:30,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:30,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:30,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:30,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:15:30,825 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:30,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:30,825 INFO L85 PathProgramCache]: Analyzing trace with hash 353774119, now seen corresponding path program 3 times [2024-06-04 16:15:30,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:30,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202543359] [2024-06-04 16:15:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:30,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:31,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:31,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202543359] [2024-06-04 16:15:31,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202543359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:31,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:31,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:31,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355589650] [2024-06-04 16:15:31,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:31,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:31,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:31,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:31,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:31,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:15:31,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 179 transitions, 1741 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:31,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:31,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:15:31,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:31,433 INFO L124 PetriNetUnfolderBase]: 1360/2397 cut-off events. [2024-06-04 16:15:31,434 INFO L125 PetriNetUnfolderBase]: For 57788/57788 co-relation queries the response was YES. [2024-06-04 16:15:31,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13413 conditions, 2397 events. 1360/2397 cut-off events. For 57788/57788 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14406 event pairs, 223 based on Foata normal form. 8/2378 useless extension candidates. Maximal degree in co-relation 13343. Up to 1912 conditions per place. [2024-06-04 16:15:31,447 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 150 selfloop transitions, 26 changer transitions 0/207 dead transitions. [2024-06-04 16:15:31,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 207 transitions, 2245 flow [2024-06-04 16:15:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 16:15:31,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-04 16:15:31,449 INFO L175 Difference]: Start difference. First operand has 145 places, 179 transitions, 1741 flow. Second operand 6 states and 154 transitions. [2024-06-04 16:15:31,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 207 transitions, 2245 flow [2024-06-04 16:15:31,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 207 transitions, 2204 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:31,547 INFO L231 Difference]: Finished difference. Result has 148 places, 180 transitions, 1774 flow [2024-06-04 16:15:31,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1774, PETRI_PLACES=148, PETRI_TRANSITIONS=180} [2024-06-04 16:15:31,548 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-04 16:15:31,548 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 180 transitions, 1774 flow [2024-06-04 16:15:31,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:31,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:31,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:31,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:15:31,549 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:31,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:31,549 INFO L85 PathProgramCache]: Analyzing trace with hash 755527113, now seen corresponding path program 1 times [2024-06-04 16:15:31,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:31,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124493823] [2024-06-04 16:15:31,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:31,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:31,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:31,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124493823] [2024-06-04 16:15:31,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124493823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:31,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:31,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:31,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180969587] [2024-06-04 16:15:31,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:31,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:31,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:31,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:31,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:31,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:31,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 180 transitions, 1774 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:31,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:31,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:31,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:32,169 INFO L124 PetriNetUnfolderBase]: 1441/2504 cut-off events. [2024-06-04 16:15:32,169 INFO L125 PetriNetUnfolderBase]: For 55415/55415 co-relation queries the response was YES. [2024-06-04 16:15:32,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13758 conditions, 2504 events. 1441/2504 cut-off events. For 55415/55415 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14946 event pairs, 272 based on Foata normal form. 6/2507 useless extension candidates. Maximal degree in co-relation 13687. Up to 2143 conditions per place. [2024-06-04 16:15:32,188 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 176 selfloop transitions, 21 changer transitions 0/204 dead transitions. [2024-06-04 16:15:32,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 204 transitions, 2296 flow [2024-06-04 16:15:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:15:32,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 16:15:32,189 INFO L175 Difference]: Start difference. First operand has 148 places, 180 transitions, 1774 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:15:32,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 204 transitions, 2296 flow [2024-06-04 16:15:32,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 204 transitions, 2236 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:32,310 INFO L231 Difference]: Finished difference. Result has 150 places, 180 transitions, 1760 flow [2024-06-04 16:15:32,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1760, PETRI_PLACES=150, PETRI_TRANSITIONS=180} [2024-06-04 16:15:32,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-04 16:15:32,311 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 180 transitions, 1760 flow [2024-06-04 16:15:32,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:32,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:32,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:32,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:15:32,311 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:32,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1623026116, now seen corresponding path program 1 times [2024-06-04 16:15:32,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:32,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667453963] [2024-06-04 16:15:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:32,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:32,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667453963] [2024-06-04 16:15:32,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667453963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:32,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:32,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:32,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102057383] [2024-06-04 16:15:32,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:32,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:32,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:32,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:32,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:32,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:32,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 180 transitions, 1760 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) [2024-06-04 16:15:32,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:32,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:32,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:32,962 INFO L124 PetriNetUnfolderBase]: 1454/2510 cut-off events. [2024-06-04 16:15:32,962 INFO L125 PetriNetUnfolderBase]: For 54689/54689 co-relation queries the response was YES. [2024-06-04 16:15:32,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13916 conditions, 2510 events. 1454/2510 cut-off events. For 54689/54689 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14901 event pairs, 321 based on Foata normal form. 1/2508 useless extension candidates. Maximal degree in co-relation 13844. Up to 2126 conditions per place. [2024-06-04 16:15:32,980 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 52 changer transitions 0/223 dead transitions. [2024-06-04 16:15:32,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 223 transitions, 2644 flow [2024-06-04 16:15:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:15:32,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 16:15:32,982 INFO L175 Difference]: Start difference. First operand has 150 places, 180 transitions, 1760 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:15:32,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 223 transitions, 2644 flow [2024-06-04 16:15:33,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 223 transitions, 2583 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:33,114 INFO L231 Difference]: Finished difference. Result has 154 places, 189 transitions, 1995 flow [2024-06-04 16:15:33,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1995, PETRI_PLACES=154, PETRI_TRANSITIONS=189} [2024-06-04 16:15:33,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-04 16:15:33,115 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 189 transitions, 1995 flow [2024-06-04 16:15:33,115 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) [2024-06-04 16:15:33,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:33,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:33,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:15:33,116 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:33,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:33,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1637876012, now seen corresponding path program 2 times [2024-06-04 16:15:33,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:33,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520883922] [2024-06-04 16:15:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:33,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:33,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:33,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520883922] [2024-06-04 16:15:33,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520883922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:33,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:33,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:33,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321542349] [2024-06-04 16:15:33,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:33,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:33,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:33,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:33,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:33,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:33,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 189 transitions, 1995 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) [2024-06-04 16:15:33,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:33,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:33,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:33,779 INFO L124 PetriNetUnfolderBase]: 1451/2506 cut-off events. [2024-06-04 16:15:33,780 INFO L125 PetriNetUnfolderBase]: For 57803/57803 co-relation queries the response was YES. [2024-06-04 16:15:33,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14126 conditions, 2506 events. 1451/2506 cut-off events. For 57803/57803 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14871 event pairs, 321 based on Foata normal form. 1/2504 useless extension candidates. Maximal degree in co-relation 14054. Up to 2123 conditions per place. [2024-06-04 16:15:33,799 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 160 selfloop transitions, 52 changer transitions 0/219 dead transitions. [2024-06-04 16:15:33,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 219 transitions, 2605 flow [2024-06-04 16:15:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:33,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-04 16:15:33,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-04 16:15:33,803 INFO L175 Difference]: Start difference. First operand has 154 places, 189 transitions, 1995 flow. Second operand 9 states and 209 transitions. [2024-06-04 16:15:33,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 219 transitions, 2605 flow [2024-06-04 16:15:33,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 219 transitions, 2466 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:33,962 INFO L231 Difference]: Finished difference. Result has 159 places, 189 transitions, 1966 flow [2024-06-04 16:15:33,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1856, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1966, PETRI_PLACES=159, PETRI_TRANSITIONS=189} [2024-06-04 16:15:33,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-04 16:15:33,963 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 189 transitions, 1966 flow [2024-06-04 16:15:33,963 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) [2024-06-04 16:15:33,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:33,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:33,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:15:33,963 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:33,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:33,964 INFO L85 PathProgramCache]: Analyzing trace with hash 820347828, now seen corresponding path program 1 times [2024-06-04 16:15:33,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:33,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298366274] [2024-06-04 16:15:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:33,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:34,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:34,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298366274] [2024-06-04 16:15:34,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298366274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:34,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:34,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:34,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893046200] [2024-06-04 16:15:34,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:34,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:34,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:34,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:34,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:34,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:34,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 189 transitions, 1966 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) [2024-06-04 16:15:34,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:34,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:34,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:34,786 INFO L124 PetriNetUnfolderBase]: 1546/2640 cut-off events. [2024-06-04 16:15:34,786 INFO L125 PetriNetUnfolderBase]: For 79089/79089 co-relation queries the response was YES. [2024-06-04 16:15:34,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15858 conditions, 2640 events. 1546/2640 cut-off events. For 79089/79089 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15685 event pairs, 323 based on Foata normal form. 10/2643 useless extension candidates. Maximal degree in co-relation 15784. Up to 2047 conditions per place. [2024-06-04 16:15:34,804 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 179 selfloop transitions, 48 changer transitions 0/234 dead transitions. [2024-06-04 16:15:34,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 234 transitions, 2788 flow [2024-06-04 16:15:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:15:34,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-04 16:15:34,805 INFO L175 Difference]: Start difference. First operand has 159 places, 189 transitions, 1966 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:15:34,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 234 transitions, 2788 flow [2024-06-04 16:15:34,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 234 transitions, 2686 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:34,961 INFO L231 Difference]: Finished difference. Result has 161 places, 193 transitions, 2062 flow [2024-06-04 16:15:34,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2062, PETRI_PLACES=161, PETRI_TRANSITIONS=193} [2024-06-04 16:15:34,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-04 16:15:34,962 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 193 transitions, 2062 flow [2024-06-04 16:15:34,962 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) [2024-06-04 16:15:34,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:34,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:34,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:15:34,962 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:34,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:34,963 INFO L85 PathProgramCache]: Analyzing trace with hash 820465938, now seen corresponding path program 2 times [2024-06-04 16:15:34,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:34,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118401050] [2024-06-04 16:15:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:34,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:35,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:35,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118401050] [2024-06-04 16:15:35,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118401050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:35,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:35,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:35,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303423025] [2024-06-04 16:15:35,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:35,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:35,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:35,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:35,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:35,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:35,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 193 transitions, 2062 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) [2024-06-04 16:15:35,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:35,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:35,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:35,695 INFO L124 PetriNetUnfolderBase]: 1523/2618 cut-off events. [2024-06-04 16:15:35,695 INFO L125 PetriNetUnfolderBase]: For 74657/74657 co-relation queries the response was YES. [2024-06-04 16:15:35,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15422 conditions, 2618 events. 1523/2618 cut-off events. For 74657/74657 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15644 event pairs, 343 based on Foata normal form. 10/2625 useless extension candidates. Maximal degree in co-relation 15347. Up to 2237 conditions per place. [2024-06-04 16:15:35,716 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 176 selfloop transitions, 43 changer transitions 0/226 dead transitions. [2024-06-04 16:15:35,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 226 transitions, 2644 flow [2024-06-04 16:15:35,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-04 16:15:35,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-04 16:15:35,721 INFO L175 Difference]: Start difference. First operand has 161 places, 193 transitions, 2062 flow. Second operand 9 states and 210 transitions. [2024-06-04 16:15:35,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 226 transitions, 2644 flow [2024-06-04 16:15:35,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 226 transitions, 2552 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:35,857 INFO L231 Difference]: Finished difference. Result has 165 places, 193 transitions, 2062 flow [2024-06-04 16:15:35,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2062, PETRI_PLACES=165, PETRI_TRANSITIONS=193} [2024-06-04 16:15:35,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-04 16:15:35,858 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 193 transitions, 2062 flow [2024-06-04 16:15:35,858 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) [2024-06-04 16:15:35,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:35,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:35,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:15:35,858 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:35,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:35,859 INFO L85 PathProgramCache]: Analyzing trace with hash 529964244, now seen corresponding path program 3 times [2024-06-04 16:15:35,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:35,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516773932] [2024-06-04 16:15:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:35,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:36,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:36,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516773932] [2024-06-04 16:15:36,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516773932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:36,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:36,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:36,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218410815] [2024-06-04 16:15:36,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:36,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:36,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:36,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:36,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:36,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:36,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 193 transitions, 2062 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) [2024-06-04 16:15:36,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:36,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:36,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:36,617 INFO L124 PetriNetUnfolderBase]: 1528/2618 cut-off events. [2024-06-04 16:15:36,617 INFO L125 PetriNetUnfolderBase]: For 66955/66955 co-relation queries the response was YES. [2024-06-04 16:15:36,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15323 conditions, 2618 events. 1528/2618 cut-off events. For 66955/66955 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 15675 event pairs, 364 based on Foata normal form. 1/2610 useless extension candidates. Maximal degree in co-relation 15246. Up to 2241 conditions per place. [2024-06-04 16:15:36,637 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 156 selfloop transitions, 54 changer transitions 0/217 dead transitions. [2024-06-04 16:15:36,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 217 transitions, 2687 flow [2024-06-04 16:15:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:15:36,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:15:36,638 INFO L175 Difference]: Start difference. First operand has 165 places, 193 transitions, 2062 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:15:36,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 217 transitions, 2687 flow [2024-06-04 16:15:36,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 217 transitions, 2586 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:36,781 INFO L231 Difference]: Finished difference. Result has 164 places, 196 transitions, 2142 flow [2024-06-04 16:15:36,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2142, PETRI_PLACES=164, PETRI_TRANSITIONS=196} [2024-06-04 16:15:36,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-04 16:15:36,781 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 196 transitions, 2142 flow [2024-06-04 16:15:36,781 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) [2024-06-04 16:15:36,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:36,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:36,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:15:36,782 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:36,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:36,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1750012430, now seen corresponding path program 4 times [2024-06-04 16:15:36,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:36,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11940334] [2024-06-04 16:15:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:36,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:37,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:37,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11940334] [2024-06-04 16:15:37,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11940334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:37,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:37,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:37,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875962413] [2024-06-04 16:15:37,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:37,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:37,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:37,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:37,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:37,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 196 transitions, 2142 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) [2024-06-04 16:15:37,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:37,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:37,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:37,489 INFO L124 PetriNetUnfolderBase]: 1533/2623 cut-off events. [2024-06-04 16:15:37,489 INFO L125 PetriNetUnfolderBase]: For 69158/69158 co-relation queries the response was YES. [2024-06-04 16:15:37,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15404 conditions, 2623 events. 1533/2623 cut-off events. For 69158/69158 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 15692 event pairs, 362 based on Foata normal form. 1/2615 useless extension candidates. Maximal degree in co-relation 15326. Up to 2247 conditions per place. [2024-06-04 16:15:37,505 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 154 selfloop transitions, 56 changer transitions 0/217 dead transitions. [2024-06-04 16:15:37,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 2767 flow [2024-06-04 16:15:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:15:37,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:15:37,506 INFO L175 Difference]: Start difference. First operand has 164 places, 196 transitions, 2142 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:15:37,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 2767 flow [2024-06-04 16:15:37,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 217 transitions, 2546 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:37,645 INFO L231 Difference]: Finished difference. Result has 165 places, 199 transitions, 2112 flow [2024-06-04 16:15:37,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1946, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2112, PETRI_PLACES=165, PETRI_TRANSITIONS=199} [2024-06-04 16:15:37,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-04 16:15:37,646 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 199 transitions, 2112 flow [2024-06-04 16:15:37,646 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) [2024-06-04 16:15:37,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:37,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:37,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:15:37,647 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:37,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:37,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1256010816, now seen corresponding path program 5 times [2024-06-04 16:15:37,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:37,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65909603] [2024-06-04 16:15:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:37,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:37,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:37,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65909603] [2024-06-04 16:15:37,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65909603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:37,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:37,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:37,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678765530] [2024-06-04 16:15:37,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:37,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:37,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:37,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:37,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:37,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:37,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 199 transitions, 2112 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) [2024-06-04 16:15:37,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:37,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:37,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:38,295 INFO L124 PetriNetUnfolderBase]: 1530/2619 cut-off events. [2024-06-04 16:15:38,295 INFO L125 PetriNetUnfolderBase]: For 69687/69687 co-relation queries the response was YES. [2024-06-04 16:15:38,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15283 conditions, 2619 events. 1530/2619 cut-off events. For 69687/69687 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 15692 event pairs, 362 based on Foata normal form. 1/2611 useless extension candidates. Maximal degree in co-relation 15204. Up to 2244 conditions per place. [2024-06-04 16:15:38,314 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 147 selfloop transitions, 59 changer transitions 0/213 dead transitions. [2024-06-04 16:15:38,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 213 transitions, 2558 flow [2024-06-04 16:15:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 16:15:38,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-04 16:15:38,316 INFO L175 Difference]: Start difference. First operand has 165 places, 199 transitions, 2112 flow. Second operand 7 states and 159 transitions. [2024-06-04 16:15:38,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 213 transitions, 2558 flow [2024-06-04 16:15:38,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 213 transitions, 2398 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:38,504 INFO L231 Difference]: Finished difference. Result has 168 places, 199 transitions, 2076 flow [2024-06-04 16:15:38,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2076, PETRI_PLACES=168, PETRI_TRANSITIONS=199} [2024-06-04 16:15:38,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-04 16:15:38,505 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 199 transitions, 2076 flow [2024-06-04 16:15:38,505 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) [2024-06-04 16:15:38,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:38,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:38,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:15:38,505 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:38,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:38,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1752862446, now seen corresponding path program 3 times [2024-06-04 16:15:38,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:38,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390754435] [2024-06-04 16:15:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:38,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:38,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:38,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390754435] [2024-06-04 16:15:38,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390754435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:38,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:38,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:38,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678136604] [2024-06-04 16:15:38,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:38,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:38,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:38,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:38,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:38,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:38,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 199 transitions, 2076 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) [2024-06-04 16:15:38,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:38,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:38,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:39,263 INFO L124 PetriNetUnfolderBase]: 1551/2643 cut-off events. [2024-06-04 16:15:39,264 INFO L125 PetriNetUnfolderBase]: For 76005/76005 co-relation queries the response was YES. [2024-06-04 16:15:39,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15665 conditions, 2643 events. 1551/2643 cut-off events. For 76005/76005 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 15818 event pairs, 356 based on Foata normal form. 2/2636 useless extension candidates. Maximal degree in co-relation 15585. Up to 2273 conditions per place. [2024-06-04 16:15:39,285 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 174 selfloop transitions, 45 changer transitions 0/226 dead transitions. [2024-06-04 16:15:39,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 226 transitions, 2762 flow [2024-06-04 16:15:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:15:39,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:15:39,286 INFO L175 Difference]: Start difference. First operand has 168 places, 199 transitions, 2076 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:15:39,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 226 transitions, 2762 flow [2024-06-04 16:15:39,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 226 transitions, 2615 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:39,463 INFO L231 Difference]: Finished difference. Result has 168 places, 203 transitions, 2128 flow [2024-06-04 16:15:39,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1929, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2128, PETRI_PLACES=168, PETRI_TRANSITIONS=203} [2024-06-04 16:15:39,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-04 16:15:39,464 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 203 transitions, 2128 flow [2024-06-04 16:15:39,464 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) [2024-06-04 16:15:39,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:39,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:39,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:15:39,464 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:39,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:39,465 INFO L85 PathProgramCache]: Analyzing trace with hash 539494388, now seen corresponding path program 4 times [2024-06-04 16:15:39,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:39,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040371473] [2024-06-04 16:15:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:39,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:39,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:39,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040371473] [2024-06-04 16:15:39,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040371473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:39,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:39,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:39,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624654190] [2024-06-04 16:15:39,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:39,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:39,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:39,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:39,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:39,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:39,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 203 transitions, 2128 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) [2024-06-04 16:15:39,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:39,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:39,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:40,186 INFO L124 PetriNetUnfolderBase]: 1559/2662 cut-off events. [2024-06-04 16:15:40,187 INFO L125 PetriNetUnfolderBase]: For 79828/79828 co-relation queries the response was YES. [2024-06-04 16:15:40,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15910 conditions, 2662 events. 1559/2662 cut-off events. For 79828/79828 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15960 event pairs, 365 based on Foata normal form. 2/2655 useless extension candidates. Maximal degree in co-relation 15829. Up to 2322 conditions per place. [2024-06-04 16:15:40,207 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 175 selfloop transitions, 41 changer transitions 0/223 dead transitions. [2024-06-04 16:15:40,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 223 transitions, 2658 flow [2024-06-04 16:15:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 16:15:40,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:15:40,209 INFO L175 Difference]: Start difference. First operand has 168 places, 203 transitions, 2128 flow. Second operand 7 states and 161 transitions. [2024-06-04 16:15:40,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 223 transitions, 2658 flow [2024-06-04 16:15:40,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 223 transitions, 2528 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:40,459 INFO L231 Difference]: Finished difference. Result has 172 places, 205 transitions, 2143 flow [2024-06-04 16:15:40,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2143, PETRI_PLACES=172, PETRI_TRANSITIONS=205} [2024-06-04 16:15:40,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-04 16:15:40,462 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 205 transitions, 2143 flow [2024-06-04 16:15:40,463 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) [2024-06-04 16:15:40,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:40,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:40,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:15:40,463 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:40,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:40,463 INFO L85 PathProgramCache]: Analyzing trace with hash -693642666, now seen corresponding path program 5 times [2024-06-04 16:15:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:40,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267591009] [2024-06-04 16:15:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:40,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:40,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267591009] [2024-06-04 16:15:40,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267591009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:40,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:40,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:40,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623878524] [2024-06-04 16:15:40,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:40,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:40,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:40,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:40,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:40,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:40,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 205 transitions, 2143 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) [2024-06-04 16:15:40,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:40,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:40,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:41,235 INFO L124 PetriNetUnfolderBase]: 1567/2694 cut-off events. [2024-06-04 16:15:41,235 INFO L125 PetriNetUnfolderBase]: For 81831/81831 co-relation queries the response was YES. [2024-06-04 16:15:41,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16057 conditions, 2694 events. 1567/2694 cut-off events. For 81831/81831 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16307 event pairs, 260 based on Foata normal form. 2/2687 useless extension candidates. Maximal degree in co-relation 15974. Up to 1961 conditions per place. [2024-06-04 16:15:41,255 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 63 changer transitions 0/240 dead transitions. [2024-06-04 16:15:41,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 240 transitions, 3061 flow [2024-06-04 16:15:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:15:41,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 16:15:41,257 INFO L175 Difference]: Start difference. First operand has 172 places, 205 transitions, 2143 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:15:41,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 240 transitions, 3061 flow [2024-06-04 16:15:41,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 240 transitions, 2956 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:41,545 INFO L231 Difference]: Finished difference. Result has 175 places, 212 transitions, 2370 flow [2024-06-04 16:15:41,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2370, PETRI_PLACES=175, PETRI_TRANSITIONS=212} [2024-06-04 16:15:41,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-04 16:15:41,546 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 212 transitions, 2370 flow [2024-06-04 16:15:41,546 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) [2024-06-04 16:15:41,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:41,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:41,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:15:41,546 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:41,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:41,547 INFO L85 PathProgramCache]: Analyzing trace with hash 194746356, now seen corresponding path program 6 times [2024-06-04 16:15:41,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:41,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457970239] [2024-06-04 16:15:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:41,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:41,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:41,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457970239] [2024-06-04 16:15:41,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457970239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:41,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:41,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:41,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241121269] [2024-06-04 16:15:41,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:41,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:41,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:41,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:41,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:41,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:41,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 212 transitions, 2370 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) [2024-06-04 16:15:41,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:41,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:41,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:42,346 INFO L124 PetriNetUnfolderBase]: 1575/2710 cut-off events. [2024-06-04 16:15:42,346 INFO L125 PetriNetUnfolderBase]: For 86320/86320 co-relation queries the response was YES. [2024-06-04 16:15:42,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16642 conditions, 2710 events. 1575/2710 cut-off events. For 86320/86320 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 16435 event pairs, 248 based on Foata normal form. 2/2703 useless extension candidates. Maximal degree in co-relation 16557. Up to 1969 conditions per place. [2024-06-04 16:15:42,364 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 167 selfloop transitions, 68 changer transitions 0/242 dead transitions. [2024-06-04 16:15:42,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 242 transitions, 3159 flow [2024-06-04 16:15:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:15:42,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 16:15:42,365 INFO L175 Difference]: Start difference. First operand has 175 places, 212 transitions, 2370 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:15:42,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 242 transitions, 3159 flow [2024-06-04 16:15:42,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 242 transitions, 3011 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:42,643 INFO L231 Difference]: Finished difference. Result has 180 places, 215 transitions, 2458 flow [2024-06-04 16:15:42,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2458, PETRI_PLACES=180, PETRI_TRANSITIONS=215} [2024-06-04 16:15:42,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-04 16:15:42,644 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 215 transitions, 2458 flow [2024-06-04 16:15:42,644 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) [2024-06-04 16:15:42,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:42,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:42,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:15:42,644 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:42,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:42,645 INFO L85 PathProgramCache]: Analyzing trace with hash 650785042, now seen corresponding path program 7 times [2024-06-04 16:15:42,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:42,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524650403] [2024-06-04 16:15:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:42,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:42,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:42,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524650403] [2024-06-04 16:15:42,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524650403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:42,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:42,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:42,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508828866] [2024-06-04 16:15:42,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:42,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:42,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:42,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:42,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:42,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:42,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 215 transitions, 2458 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) [2024-06-04 16:15:42,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:42,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:42,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:43,365 INFO L124 PetriNetUnfolderBase]: 1570/2703 cut-off events. [2024-06-04 16:15:43,365 INFO L125 PetriNetUnfolderBase]: For 84562/84562 co-relation queries the response was YES. [2024-06-04 16:15:43,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16525 conditions, 2703 events. 1570/2703 cut-off events. For 84562/84562 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 16369 event pairs, 366 based on Foata normal form. 2/2694 useless extension candidates. Maximal degree in co-relation 16438. Up to 2278 conditions per place. [2024-06-04 16:15:43,387 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 50 changer transitions 0/235 dead transitions. [2024-06-04 16:15:43,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 235 transitions, 3092 flow [2024-06-04 16:15:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:15:43,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:15:43,388 INFO L175 Difference]: Start difference. First operand has 180 places, 215 transitions, 2458 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:15:43,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 235 transitions, 3092 flow [2024-06-04 16:15:43,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 235 transitions, 2935 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:43,712 INFO L231 Difference]: Finished difference. Result has 184 places, 215 transitions, 2406 flow [2024-06-04 16:15:43,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2406, PETRI_PLACES=184, PETRI_TRANSITIONS=215} [2024-06-04 16:15:43,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-04 16:15:43,712 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 215 transitions, 2406 flow [2024-06-04 16:15:43,713 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) [2024-06-04 16:15:43,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:43,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:43,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:15:43,713 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:43,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:43,714 INFO L85 PathProgramCache]: Analyzing trace with hash -604987626, now seen corresponding path program 8 times [2024-06-04 16:15:43,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:43,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401915252] [2024-06-04 16:15:43,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:43,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:44,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:44,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401915252] [2024-06-04 16:15:44,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401915252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:44,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:44,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:44,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701929973] [2024-06-04 16:15:44,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:44,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:44,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:44,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:44,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:44,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 215 transitions, 2406 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) [2024-06-04 16:15:44,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:44,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:44,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:44,417 INFO L124 PetriNetUnfolderBase]: 1565/2698 cut-off events. [2024-06-04 16:15:44,417 INFO L125 PetriNetUnfolderBase]: For 84132/84132 co-relation queries the response was YES. [2024-06-04 16:15:44,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16221 conditions, 2698 events. 1565/2698 cut-off events. For 84132/84132 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 16352 event pairs, 369 based on Foata normal form. 2/2691 useless extension candidates. Maximal degree in co-relation 16133. Up to 2332 conditions per place. [2024-06-04 16:15:44,439 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 43 changer transitions 0/230 dead transitions. [2024-06-04 16:15:44,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 230 transitions, 2888 flow [2024-06-04 16:15:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 16:15:44,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-04 16:15:44,440 INFO L175 Difference]: Start difference. First operand has 184 places, 215 transitions, 2406 flow. Second operand 7 states and 159 transitions. [2024-06-04 16:15:44,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 230 transitions, 2888 flow [2024-06-04 16:15:44,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 230 transitions, 2678 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:44,731 INFO L231 Difference]: Finished difference. Result has 184 places, 215 transitions, 2287 flow [2024-06-04 16:15:44,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2196, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2287, PETRI_PLACES=184, PETRI_TRANSITIONS=215} [2024-06-04 16:15:44,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-04 16:15:44,732 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 215 transitions, 2287 flow [2024-06-04 16:15:44,732 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) [2024-06-04 16:15:44,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:44,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:44,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:15:44,732 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:44,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:44,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1165311094, now seen corresponding path program 1 times [2024-06-04 16:15:44,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:44,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205053853] [2024-06-04 16:15:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:44,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:44,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:44,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205053853] [2024-06-04 16:15:44,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205053853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:44,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:44,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:44,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146516028] [2024-06-04 16:15:44,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:44,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:44,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:45,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:45,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 215 transitions, 2287 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:45,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:45,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:45,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:45,424 INFO L124 PetriNetUnfolderBase]: 1586/2742 cut-off events. [2024-06-04 16:15:45,424 INFO L125 PetriNetUnfolderBase]: For 86790/86790 co-relation queries the response was YES. [2024-06-04 16:15:45,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16269 conditions, 2742 events. 1586/2742 cut-off events. For 86790/86790 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 16634 event pairs, 349 based on Foata normal form. 1/2740 useless extension candidates. Maximal degree in co-relation 16181. Up to 2280 conditions per place. [2024-06-04 16:15:45,447 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 73 changer transitions 0/259 dead transitions. [2024-06-04 16:15:45,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 259 transitions, 3371 flow [2024-06-04 16:15:45,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-04 16:15:45,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962059620596206 [2024-06-04 16:15:45,448 INFO L175 Difference]: Start difference. First operand has 184 places, 215 transitions, 2287 flow. Second operand 9 states and 220 transitions. [2024-06-04 16:15:45,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 259 transitions, 3371 flow [2024-06-04 16:15:45,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 259 transitions, 3274 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:45,784 INFO L231 Difference]: Finished difference. Result has 187 places, 224 transitions, 2498 flow [2024-06-04 16:15:45,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2190, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2498, PETRI_PLACES=187, PETRI_TRANSITIONS=224} [2024-06-04 16:15:45,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-04 16:15:45,785 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 224 transitions, 2498 flow [2024-06-04 16:15:45,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:45,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:45,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:45,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:15:45,786 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:45,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:45,786 INFO L85 PathProgramCache]: Analyzing trace with hash -630792624, now seen corresponding path program 2 times [2024-06-04 16:15:45,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:45,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311450184] [2024-06-04 16:15:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:45,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:46,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:46,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311450184] [2024-06-04 16:15:46,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311450184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:46,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:46,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:46,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94796122] [2024-06-04 16:15:46,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:46,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:46,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:46,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:46,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:46,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:46,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 224 transitions, 2498 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:46,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:46,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:46,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:46,520 INFO L124 PetriNetUnfolderBase]: 1599/2768 cut-off events. [2024-06-04 16:15:46,520 INFO L125 PetriNetUnfolderBase]: For 93489/93489 co-relation queries the response was YES. [2024-06-04 16:15:46,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16945 conditions, 2768 events. 1599/2768 cut-off events. For 93489/93489 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 16904 event pairs, 351 based on Foata normal form. 1/2766 useless extension candidates. Maximal degree in co-relation 16856. Up to 2227 conditions per place. [2024-06-04 16:15:46,543 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 155 selfloop transitions, 107 changer transitions 0/269 dead transitions. [2024-06-04 16:15:46,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 269 transitions, 3628 flow [2024-06-04 16:15:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:46,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-04 16:15:46,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-04 16:15:46,544 INFO L175 Difference]: Start difference. First operand has 187 places, 224 transitions, 2498 flow. Second operand 10 states and 238 transitions. [2024-06-04 16:15:46,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 269 transitions, 3628 flow [2024-06-04 16:15:46,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 269 transitions, 3503 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:46,980 INFO L231 Difference]: Finished difference. Result has 193 places, 233 transitions, 2767 flow [2024-06-04 16:15:46,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2767, PETRI_PLACES=193, PETRI_TRANSITIONS=233} [2024-06-04 16:15:46,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-04 16:15:46,981 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 233 transitions, 2767 flow [2024-06-04 16:15:46,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:46,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:46,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:46,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:15:46,982 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:46,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:46,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1785869260, now seen corresponding path program 3 times [2024-06-04 16:15:46,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:46,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808956500] [2024-06-04 16:15:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:46,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:47,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:47,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808956500] [2024-06-04 16:15:47,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808956500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:47,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:47,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:47,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441552867] [2024-06-04 16:15:47,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:47,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:47,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:47,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:47,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:47,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 233 transitions, 2767 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:47,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:47,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:47,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:47,743 INFO L124 PetriNetUnfolderBase]: 1604/2773 cut-off events. [2024-06-04 16:15:47,743 INFO L125 PetriNetUnfolderBase]: For 98671/98671 co-relation queries the response was YES. [2024-06-04 16:15:47,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17567 conditions, 2773 events. 1604/2773 cut-off events. For 98671/98671 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 16889 event pairs, 349 based on Foata normal form. 1/2771 useless extension candidates. Maximal degree in co-relation 17476. Up to 2304 conditions per place. [2024-06-04 16:15:47,764 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 75 changer transitions 0/267 dead transitions. [2024-06-04 16:15:47,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 267 transitions, 3655 flow [2024-06-04 16:15:47,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-04 16:15:47,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-04 16:15:47,766 INFO L175 Difference]: Start difference. First operand has 193 places, 233 transitions, 2767 flow. Second operand 9 states and 215 transitions. [2024-06-04 16:15:47,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 267 transitions, 3655 flow [2024-06-04 16:15:48,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 267 transitions, 3505 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:48,004 INFO L231 Difference]: Finished difference. Result has 197 places, 236 transitions, 2817 flow [2024-06-04 16:15:48,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2817, PETRI_PLACES=197, PETRI_TRANSITIONS=236} [2024-06-04 16:15:48,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-04 16:15:48,004 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 236 transitions, 2817 flow [2024-06-04 16:15:48,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:48,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:48,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:48,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:15:48,005 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:48,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:48,005 INFO L85 PathProgramCache]: Analyzing trace with hash -335573424, now seen corresponding path program 4 times [2024-06-04 16:15:48,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:48,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144127048] [2024-06-04 16:15:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:48,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:48,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:48,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144127048] [2024-06-04 16:15:48,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144127048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:48,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:48,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:48,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995127126] [2024-06-04 16:15:48,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:48,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:48,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:48,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:48,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:48,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:48,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 236 transitions, 2817 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:48,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:48,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:48,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:48,734 INFO L124 PetriNetUnfolderBase]: 1609/2786 cut-off events. [2024-06-04 16:15:48,734 INFO L125 PetriNetUnfolderBase]: For 99339/99339 co-relation queries the response was YES. [2024-06-04 16:15:48,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17504 conditions, 2786 events. 1609/2786 cut-off events. For 99339/99339 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 16981 event pairs, 351 based on Foata normal form. 1/2784 useless extension candidates. Maximal degree in co-relation 17411. Up to 2239 conditions per place. [2024-06-04 16:15:48,758 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 155 selfloop transitions, 110 changer transitions 0/272 dead transitions. [2024-06-04 16:15:48,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 272 transitions, 3833 flow [2024-06-04 16:15:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-04 16:15:48,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-04 16:15:48,759 INFO L175 Difference]: Start difference. First operand has 197 places, 236 transitions, 2817 flow. Second operand 10 states and 236 transitions. [2024-06-04 16:15:48,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 272 transitions, 3833 flow [2024-06-04 16:15:49,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 272 transitions, 3691 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:49,120 INFO L231 Difference]: Finished difference. Result has 201 places, 239 transitions, 2945 flow [2024-06-04 16:15:49,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2675, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2945, PETRI_PLACES=201, PETRI_TRANSITIONS=239} [2024-06-04 16:15:49,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-04 16:15:49,121 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 239 transitions, 2945 flow [2024-06-04 16:15:49,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:49,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:49,122 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] [2024-06-04 16:15:49,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:15:49,122 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:49,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:49,122 INFO L85 PathProgramCache]: Analyzing trace with hash -335217234, now seen corresponding path program 5 times [2024-06-04 16:15:49,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:49,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205890287] [2024-06-04 16:15:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:49,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:49,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:49,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205890287] [2024-06-04 16:15:49,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205890287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:49,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:49,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:49,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524953214] [2024-06-04 16:15:49,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:49,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:49,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:49,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:49,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:49,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:49,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 239 transitions, 2945 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:49,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:49,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:49,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:49,853 INFO L124 PetriNetUnfolderBase]: 1606/2778 cut-off events. [2024-06-04 16:15:49,854 INFO L125 PetriNetUnfolderBase]: For 101195/101195 co-relation queries the response was YES. [2024-06-04 16:15:49,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17556 conditions, 2778 events. 1606/2778 cut-off events. For 101195/101195 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 16928 event pairs, 349 based on Foata normal form. 1/2776 useless extension candidates. Maximal degree in co-relation 17462. Up to 2236 conditions per place. [2024-06-04 16:15:49,876 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 153 selfloop transitions, 111 changer transitions 0/271 dead transitions. [2024-06-04 16:15:49,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 271 transitions, 3807 flow [2024-06-04 16:15:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-04 16:15:49,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-04 16:15:49,879 INFO L175 Difference]: Start difference. First operand has 201 places, 239 transitions, 2945 flow. Second operand 10 states and 234 transitions. [2024-06-04 16:15:49,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 271 transitions, 3807 flow [2024-06-04 16:15:50,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 271 transitions, 3512 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:50,183 INFO L231 Difference]: Finished difference. Result has 203 places, 239 transitions, 2878 flow [2024-06-04 16:15:50,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2878, PETRI_PLACES=203, PETRI_TRANSITIONS=239} [2024-06-04 16:15:50,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-04 16:15:50,184 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 239 transitions, 2878 flow [2024-06-04 16:15:50,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:50,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:50,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:50,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:15:50,185 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:50,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:50,185 INFO L85 PathProgramCache]: Analyzing trace with hash 475074336, now seen corresponding path program 6 times [2024-06-04 16:15:50,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:50,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267507568] [2024-06-04 16:15:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:50,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:50,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:50,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267507568] [2024-06-04 16:15:50,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267507568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:50,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:50,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:50,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130285791] [2024-06-04 16:15:50,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:50,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:50,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:50,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:50,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:50,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:50,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 239 transitions, 2878 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:50,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:50,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:50,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:50,891 INFO L124 PetriNetUnfolderBase]: 1619/2804 cut-off events. [2024-06-04 16:15:50,891 INFO L125 PetriNetUnfolderBase]: For 105873/105873 co-relation queries the response was YES. [2024-06-04 16:15:50,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17778 conditions, 2804 events. 1619/2804 cut-off events. For 105873/105873 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 17155 event pairs, 351 based on Foata normal form. 1/2802 useless extension candidates. Maximal degree in co-relation 17683. Up to 2322 conditions per place. [2024-06-04 16:15:50,914 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 181 selfloop transitions, 86 changer transitions 0/274 dead transitions. [2024-06-04 16:15:50,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 274 transitions, 3856 flow [2024-06-04 16:15:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-04 16:15:50,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-04 16:15:50,915 INFO L175 Difference]: Start difference. First operand has 203 places, 239 transitions, 2878 flow. Second operand 10 states and 229 transitions. [2024-06-04 16:15:50,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 274 transitions, 3856 flow [2024-06-04 16:15:51,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 274 transitions, 3614 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:15:51,257 INFO L231 Difference]: Finished difference. Result has 204 places, 245 transitions, 2928 flow [2024-06-04 16:15:51,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2648, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2928, PETRI_PLACES=204, PETRI_TRANSITIONS=245} [2024-06-04 16:15:51,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-04 16:15:51,258 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 245 transitions, 2928 flow [2024-06-04 16:15:51,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:51,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:51,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:51,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:15:51,258 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:51,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:51,259 INFO L85 PathProgramCache]: Analyzing trace with hash 321653910, now seen corresponding path program 1 times [2024-06-04 16:15:51,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:51,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003655959] [2024-06-04 16:15:51,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:51,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:51,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:51,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003655959] [2024-06-04 16:15:51,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003655959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:51,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:51,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:51,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925577921] [2024-06-04 16:15:51,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:51,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:51,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:51,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:51,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:51,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:51,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 245 transitions, 2928 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:51,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:51,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:51,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:51,947 INFO L124 PetriNetUnfolderBase]: 1646/2853 cut-off events. [2024-06-04 16:15:51,947 INFO L125 PetriNetUnfolderBase]: For 107505/107505 co-relation queries the response was YES. [2024-06-04 16:15:51,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17623 conditions, 2853 events. 1646/2853 cut-off events. For 107505/107505 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 17454 event pairs, 291 based on Foata normal form. 6/2856 useless extension candidates. Maximal degree in co-relation 17527. Up to 2369 conditions per place. [2024-06-04 16:15:51,971 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 245 selfloop transitions, 31 changer transitions 0/283 dead transitions. [2024-06-04 16:15:51,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 283 transitions, 3688 flow [2024-06-04 16:15:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 16:15:51,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-04 16:15:51,972 INFO L175 Difference]: Start difference. First operand has 204 places, 245 transitions, 2928 flow. Second operand 7 states and 174 transitions. [2024-06-04 16:15:51,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 283 transitions, 3688 flow [2024-06-04 16:15:52,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 283 transitions, 3541 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:52,265 INFO L231 Difference]: Finished difference. Result has 206 places, 249 transitions, 2911 flow [2024-06-04 16:15:52,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2911, PETRI_PLACES=206, PETRI_TRANSITIONS=249} [2024-06-04 16:15:52,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-04 16:15:52,266 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 249 transitions, 2911 flow [2024-06-04 16:15:52,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:52,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:52,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:52,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:15:52,266 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:52,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:52,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1230727590, now seen corresponding path program 1 times [2024-06-04 16:15:52,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:52,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381640099] [2024-06-04 16:15:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:52,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:52,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:52,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381640099] [2024-06-04 16:15:52,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381640099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:52,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:52,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:52,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983389414] [2024-06-04 16:15:52,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:52,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:52,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:52,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:52,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:52,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:52,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 249 transitions, 2911 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:52,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:52,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:52,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:53,207 INFO L124 PetriNetUnfolderBase]: 1907/3289 cut-off events. [2024-06-04 16:15:53,207 INFO L125 PetriNetUnfolderBase]: For 214942/214942 co-relation queries the response was YES. [2024-06-04 16:15:53,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21860 conditions, 3289 events. 1907/3289 cut-off events. For 214942/214942 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20651 event pairs, 420 based on Foata normal form. 30/3316 useless extension candidates. Maximal degree in co-relation 21762. Up to 2251 conditions per place. [2024-06-04 16:15:53,238 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 217 selfloop transitions, 69 changer transitions 4/297 dead transitions. [2024-06-04 16:15:53,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 297 transitions, 4003 flow [2024-06-04 16:15:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-04 16:15:53,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-04 16:15:53,240 INFO L175 Difference]: Start difference. First operand has 206 places, 249 transitions, 2911 flow. Second operand 9 states and 226 transitions. [2024-06-04 16:15:53,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 297 transitions, 4003 flow [2024-06-04 16:15:53,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 297 transitions, 3943 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:53,655 INFO L231 Difference]: Finished difference. Result has 212 places, 250 transitions, 3015 flow [2024-06-04 16:15:53,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3015, PETRI_PLACES=212, PETRI_TRANSITIONS=250} [2024-06-04 16:15:53,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-04 16:15:53,656 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 250 transitions, 3015 flow [2024-06-04 16:15:53,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:53,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:53,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:53,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:15:53,656 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:53,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:53,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1785876204, now seen corresponding path program 2 times [2024-06-04 16:15:53,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:53,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45639213] [2024-06-04 16:15:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:53,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:53,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:53,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45639213] [2024-06-04 16:15:53,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45639213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:53,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:53,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:53,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995627103] [2024-06-04 16:15:53,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:53,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:53,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:53,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:53,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:53,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:53,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 250 transitions, 3015 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:53,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:53,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:53,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:54,450 INFO L124 PetriNetUnfolderBase]: 1927/3320 cut-off events. [2024-06-04 16:15:54,450 INFO L125 PetriNetUnfolderBase]: For 229822/229822 co-relation queries the response was YES. [2024-06-04 16:15:54,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22300 conditions, 3320 events. 1927/3320 cut-off events. For 229822/229822 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20861 event pairs, 489 based on Foata normal form. 34/3351 useless extension candidates. Maximal degree in co-relation 22201. Up to 2715 conditions per place. [2024-06-04 16:15:54,479 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 65 changer transitions 4/287 dead transitions. [2024-06-04 16:15:54,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 287 transitions, 3883 flow [2024-06-04 16:15:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:15:54,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-04 16:15:54,480 INFO L175 Difference]: Start difference. First operand has 212 places, 250 transitions, 3015 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:15:54,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 287 transitions, 3883 flow [2024-06-04 16:15:54,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 287 transitions, 3794 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:54,991 INFO L231 Difference]: Finished difference. Result has 216 places, 249 transitions, 3053 flow [2024-06-04 16:15:54,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3053, PETRI_PLACES=216, PETRI_TRANSITIONS=249} [2024-06-04 16:15:54,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-04 16:15:54,991 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 249 transitions, 3053 flow [2024-06-04 16:15:54,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:54,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:54,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:54,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:15:54,992 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:54,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash -423923920, now seen corresponding path program 3 times [2024-06-04 16:15:54,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:54,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901276537] [2024-06-04 16:15:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:54,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:55,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:55,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901276537] [2024-06-04 16:15:55,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901276537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:55,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:55,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:55,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889481403] [2024-06-04 16:15:55,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:55,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:55,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:55,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:55,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:55,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:55,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 249 transitions, 3053 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:55,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:55,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:55,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:55,949 INFO L124 PetriNetUnfolderBase]: 2105/3633 cut-off events. [2024-06-04 16:15:55,949 INFO L125 PetriNetUnfolderBase]: For 294681/294681 co-relation queries the response was YES. [2024-06-04 16:15:55,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26106 conditions, 3633 events. 2105/3633 cut-off events. For 294681/294681 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23246 event pairs, 525 based on Foata normal form. 30/3660 useless extension candidates. Maximal degree in co-relation 26005. Up to 2130 conditions per place. [2024-06-04 16:15:55,983 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 195 selfloop transitions, 91 changer transitions 9/302 dead transitions. [2024-06-04 16:15:55,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 302 transitions, 4213 flow [2024-06-04 16:15:55,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-04 16:15:55,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024390243902439 [2024-06-04 16:15:55,984 INFO L175 Difference]: Start difference. First operand has 216 places, 249 transitions, 3053 flow. Second operand 10 states and 247 transitions. [2024-06-04 16:15:55,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 302 transitions, 4213 flow [2024-06-04 16:15:56,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 302 transitions, 4078 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:56,624 INFO L231 Difference]: Finished difference. Result has 219 places, 248 transitions, 3073 flow [2024-06-04 16:15:56,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2918, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3073, PETRI_PLACES=219, PETRI_TRANSITIONS=248} [2024-06-04 16:15:56,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-04 16:15:56,624 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 248 transitions, 3073 flow [2024-06-04 16:15:56,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:56,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:56,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:56,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 16:15:56,625 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:56,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:56,625 INFO L85 PathProgramCache]: Analyzing trace with hash -335358160, now seen corresponding path program 4 times [2024-06-04 16:15:56,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:56,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948274755] [2024-06-04 16:15:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:56,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:56,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:56,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948274755] [2024-06-04 16:15:56,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948274755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:56,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:56,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:56,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446908657] [2024-06-04 16:15:56,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:56,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:56,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:56,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:56,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 248 transitions, 3073 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:56,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:56,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:56,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:57,478 INFO L124 PetriNetUnfolderBase]: 2013/3484 cut-off events. [2024-06-04 16:15:57,478 INFO L125 PetriNetUnfolderBase]: For 301327/301327 co-relation queries the response was YES. [2024-06-04 16:15:57,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25369 conditions, 3484 events. 2013/3484 cut-off events. For 301327/301327 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22093 event pairs, 522 based on Foata normal form. 30/3511 useless extension candidates. Maximal degree in co-relation 25267. Up to 2530 conditions per place. [2024-06-04 16:15:57,604 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 196 selfloop transitions, 86 changer transitions 4/293 dead transitions. [2024-06-04 16:15:57,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 293 transitions, 4149 flow [2024-06-04 16:15:57,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-04 16:15:57,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-04 16:15:57,605 INFO L175 Difference]: Start difference. First operand has 219 places, 248 transitions, 3073 flow. Second operand 10 states and 242 transitions. [2024-06-04 16:15:57,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 293 transitions, 4149 flow [2024-06-04 16:15:58,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 293 transitions, 3977 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:58,480 INFO L231 Difference]: Finished difference. Result has 223 places, 248 transitions, 3084 flow [2024-06-04 16:15:58,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2901, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3084, PETRI_PLACES=223, PETRI_TRANSITIONS=248} [2024-06-04 16:15:58,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-04 16:15:58,480 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 248 transitions, 3084 flow [2024-06-04 16:15:58,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:58,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:58,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:58,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 16:15:58,481 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:58,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:58,481 INFO L85 PathProgramCache]: Analyzing trace with hash -335210290, now seen corresponding path program 5 times [2024-06-04 16:15:58,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:58,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098572777] [2024-06-04 16:15:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:58,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:58,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:58,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098572777] [2024-06-04 16:15:58,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098572777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:58,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:58,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:58,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890273668] [2024-06-04 16:15:58,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:58,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:58,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:58,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:58,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:58,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 248 transitions, 3084 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:58,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:58,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:58,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:59,383 INFO L124 PetriNetUnfolderBase]: 1914/3331 cut-off events. [2024-06-04 16:15:59,383 INFO L125 PetriNetUnfolderBase]: For 250726/250726 co-relation queries the response was YES. [2024-06-04 16:15:59,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22486 conditions, 3331 events. 1914/3331 cut-off events. For 250726/250726 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21037 event pairs, 521 based on Foata normal form. 34/3362 useless extension candidates. Maximal degree in co-relation 22382. Up to 2670 conditions per place. [2024-06-04 16:15:59,411 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 192 selfloop transitions, 81 changer transitions 5/285 dead transitions. [2024-06-04 16:15:59,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 285 transitions, 3936 flow [2024-06-04 16:15:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-04 16:15:59,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 16:15:59,413 INFO L175 Difference]: Start difference. First operand has 223 places, 248 transitions, 3084 flow. Second operand 10 states and 235 transitions. [2024-06-04 16:15:59,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 285 transitions, 3936 flow [2024-06-04 16:16:00,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 285 transitions, 3670 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-04 16:16:00,119 INFO L231 Difference]: Finished difference. Result has 224 places, 245 transitions, 2946 flow [2024-06-04 16:16:00,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2818, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2946, PETRI_PLACES=224, PETRI_TRANSITIONS=245} [2024-06-04 16:16:00,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-04 16:16:00,119 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 245 transitions, 2946 flow [2024-06-04 16:16:00,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:00,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:00,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:00,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 16:16:00,120 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:00,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:00,120 INFO L85 PathProgramCache]: Analyzing trace with hash 669020690, now seen corresponding path program 6 times [2024-06-04 16:16:00,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:00,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826484672] [2024-06-04 16:16:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:00,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:00,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:00,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826484672] [2024-06-04 16:16:00,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826484672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:00,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:00,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:00,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580652942] [2024-06-04 16:16:00,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:00,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:00,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:00,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:00,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:00,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:00,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 245 transitions, 2946 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:00,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:00,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:00,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:01,026 INFO L124 PetriNetUnfolderBase]: 1859/3208 cut-off events. [2024-06-04 16:16:01,026 INFO L125 PetriNetUnfolderBase]: For 255225/255225 co-relation queries the response was YES. [2024-06-04 16:16:01,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21698 conditions, 3208 events. 1859/3208 cut-off events. For 255225/255225 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19985 event pairs, 477 based on Foata normal form. 34/3239 useless extension candidates. Maximal degree in co-relation 21594. Up to 2617 conditions per place. [2024-06-04 16:16:01,054 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 206 selfloop transitions, 63 changer transitions 4/280 dead transitions. [2024-06-04 16:16:01,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 280 transitions, 3804 flow [2024-06-04 16:16:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-04 16:16:01,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-04 16:16:01,056 INFO L175 Difference]: Start difference. First operand has 224 places, 245 transitions, 2946 flow. Second operand 10 states and 231 transitions. [2024-06-04 16:16:01,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 280 transitions, 3804 flow [2024-06-04 16:16:01,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 280 transitions, 3623 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-04 16:16:01,601 INFO L231 Difference]: Finished difference. Result has 223 places, 244 transitions, 2899 flow [2024-06-04 16:16:01,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2765, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2899, PETRI_PLACES=223, PETRI_TRANSITIONS=244} [2024-06-04 16:16:01,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-04 16:16:01,602 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 244 transitions, 2899 flow [2024-06-04 16:16:01,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:01,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:01,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:01,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 16:16:01,602 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:01,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:01,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1992802506, now seen corresponding path program 1 times [2024-06-04 16:16:01,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:01,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334846900] [2024-06-04 16:16:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:01,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:01,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:01,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334846900] [2024-06-04 16:16:01,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334846900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:01,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:01,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:01,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437670170] [2024-06-04 16:16:01,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:01,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:01,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:01,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:01,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 244 transitions, 2899 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:01,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:01,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:01,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:02,420 INFO L124 PetriNetUnfolderBase]: 1910/3301 cut-off events. [2024-06-04 16:16:02,421 INFO L125 PetriNetUnfolderBase]: For 272380/272380 co-relation queries the response was YES. [2024-06-04 16:16:02,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22777 conditions, 3301 events. 1910/3301 cut-off events. For 272380/272380 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20674 event pairs, 449 based on Foata normal form. 30/3328 useless extension candidates. Maximal degree in co-relation 22673. Up to 2559 conditions per place. [2024-06-04 16:16:02,449 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 207 selfloop transitions, 64 changer transitions 10/288 dead transitions. [2024-06-04 16:16:02,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 288 transitions, 3999 flow [2024-06-04 16:16:02,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:02,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:02,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-04 16:16:02,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-04 16:16:02,451 INFO L175 Difference]: Start difference. First operand has 223 places, 244 transitions, 2899 flow. Second operand 10 states and 236 transitions. [2024-06-04 16:16:02,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 288 transitions, 3999 flow [2024-06-04 16:16:03,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 288 transitions, 3866 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:03,043 INFO L231 Difference]: Finished difference. Result has 226 places, 242 transitions, 2898 flow [2024-06-04 16:16:03,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2766, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2898, PETRI_PLACES=226, PETRI_TRANSITIONS=242} [2024-06-04 16:16:03,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-04 16:16:03,043 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 242 transitions, 2898 flow [2024-06-04 16:16:03,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:03,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:03,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:03,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 16:16:03,044 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:03,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:03,044 INFO L85 PathProgramCache]: Analyzing trace with hash -865691026, now seen corresponding path program 7 times [2024-06-04 16:16:03,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:03,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954169447] [2024-06-04 16:16:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:03,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:03,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:03,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954169447] [2024-06-04 16:16:03,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954169447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:03,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:03,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:03,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412913537] [2024-06-04 16:16:03,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:03,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:03,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:03,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:03,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:03,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:03,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 242 transitions, 2898 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:03,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:03,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:03,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:03,809 INFO L124 PetriNetUnfolderBase]: 1812/3112 cut-off events. [2024-06-04 16:16:03,809 INFO L125 PetriNetUnfolderBase]: For 218128/218128 co-relation queries the response was YES. [2024-06-04 16:16:03,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22111 conditions, 3112 events. 1812/3112 cut-off events. For 218128/218128 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19250 event pairs, 475 based on Foata normal form. 1/3105 useless extension candidates. Maximal degree in co-relation 22005. Up to 2658 conditions per place. [2024-06-04 16:16:03,838 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 75 changer transitions 0/267 dead transitions. [2024-06-04 16:16:03,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 267 transitions, 3785 flow [2024-06-04 16:16:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:16:03,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 16:16:03,839 INFO L175 Difference]: Start difference. First operand has 226 places, 242 transitions, 2898 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:16:03,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 267 transitions, 3785 flow [2024-06-04 16:16:04,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 267 transitions, 3666 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:04,412 INFO L231 Difference]: Finished difference. Result has 225 places, 245 transitions, 2984 flow [2024-06-04 16:16:04,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2779, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2984, PETRI_PLACES=225, PETRI_TRANSITIONS=245} [2024-06-04 16:16:04,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-04 16:16:04,413 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 245 transitions, 2984 flow [2024-06-04 16:16:04,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:04,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:04,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:04,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 16:16:04,413 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:04,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:04,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1483637812, now seen corresponding path program 8 times [2024-06-04 16:16:04,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:04,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353777387] [2024-06-04 16:16:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:04,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:04,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:04,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353777387] [2024-06-04 16:16:04,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353777387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:04,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:04,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:04,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124237483] [2024-06-04 16:16:04,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:04,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:04,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:04,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:04,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:04,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:04,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 245 transitions, 2984 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:04,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:04,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:04,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:05,167 INFO L124 PetriNetUnfolderBase]: 1809/3108 cut-off events. [2024-06-04 16:16:05,167 INFO L125 PetriNetUnfolderBase]: For 221031/221031 co-relation queries the response was YES. [2024-06-04 16:16:05,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22132 conditions, 3108 events. 1809/3108 cut-off events. For 221031/221031 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19271 event pairs, 475 based on Foata normal form. 1/3101 useless extension candidates. Maximal degree in co-relation 22024. Up to 2655 conditions per place. [2024-06-04 16:16:05,195 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 184 selfloop transitions, 73 changer transitions 0/264 dead transitions. [2024-06-04 16:16:05,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 264 transitions, 3812 flow [2024-06-04 16:16:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:05,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:16:05,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:16:05,196 INFO L175 Difference]: Start difference. First operand has 225 places, 245 transitions, 2984 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:16:05,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 264 transitions, 3812 flow [2024-06-04 16:16:05,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 264 transitions, 3587 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:05,699 INFO L231 Difference]: Finished difference. Result has 227 places, 245 transitions, 2911 flow [2024-06-04 16:16:05,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2911, PETRI_PLACES=227, PETRI_TRANSITIONS=245} [2024-06-04 16:16:05,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-04 16:16:05,699 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 245 transitions, 2911 flow [2024-06-04 16:16:05,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:05,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:05,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:05,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 16:16:05,700 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:05,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:05,700 INFO L85 PathProgramCache]: Analyzing trace with hash -750976082, now seen corresponding path program 9 times [2024-06-04 16:16:05,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:05,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301349366] [2024-06-04 16:16:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:05,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:05,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:05,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301349366] [2024-06-04 16:16:05,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301349366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:05,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:05,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:05,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605091062] [2024-06-04 16:16:05,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:05,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:05,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:05,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:05,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:06,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:06,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 245 transitions, 2911 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:06,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:06,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:06,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:06,553 INFO L124 PetriNetUnfolderBase]: 1814/3117 cut-off events. [2024-06-04 16:16:06,553 INFO L125 PetriNetUnfolderBase]: For 226985/226985 co-relation queries the response was YES. [2024-06-04 16:16:06,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22213 conditions, 3117 events. 1814/3117 cut-off events. For 226985/226985 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19320 event pairs, 452 based on Foata normal form. 1/3110 useless extension candidates. Maximal degree in co-relation 22104. Up to 2596 conditions per place. [2024-06-04 16:16:06,582 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 147 selfloop transitions, 117 changer transitions 0/271 dead transitions. [2024-06-04 16:16:06,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 271 transitions, 3825 flow [2024-06-04 16:16:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:16:06,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-04 16:16:06,584 INFO L175 Difference]: Start difference. First operand has 227 places, 245 transitions, 2911 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:16:06,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 271 transitions, 3825 flow [2024-06-04 16:16:07,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 271 transitions, 3679 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:07,139 INFO L231 Difference]: Finished difference. Result has 230 places, 248 transitions, 3063 flow [2024-06-04 16:16:07,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2765, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3063, PETRI_PLACES=230, PETRI_TRANSITIONS=248} [2024-06-04 16:16:07,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-04 16:16:07,140 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 248 transitions, 3063 flow [2024-06-04 16:16:07,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:07,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:07,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:07,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 16:16:07,141 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:07,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:07,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1584191056, now seen corresponding path program 10 times [2024-06-04 16:16:07,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:07,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026213087] [2024-06-04 16:16:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:07,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:07,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026213087] [2024-06-04 16:16:07,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026213087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:07,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:07,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:07,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359503699] [2024-06-04 16:16:07,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:07,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:07,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:07,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:07,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:07,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:07,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 248 transitions, 3063 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:07,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:07,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:07,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:07,911 INFO L124 PetriNetUnfolderBase]: 1827/3135 cut-off events. [2024-06-04 16:16:07,912 INFO L125 PetriNetUnfolderBase]: For 236252/236252 co-relation queries the response was YES. [2024-06-04 16:16:07,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22657 conditions, 3135 events. 1827/3135 cut-off events. For 236252/236252 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19408 event pairs, 450 based on Foata normal form. 1/3128 useless extension candidates. Maximal degree in co-relation 22547. Up to 2611 conditions per place. [2024-06-04 16:16:07,941 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 151 selfloop transitions, 117 changer transitions 0/275 dead transitions. [2024-06-04 16:16:07,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 275 transitions, 4191 flow [2024-06-04 16:16:07,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:16:07,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-04 16:16:07,942 INFO L175 Difference]: Start difference. First operand has 230 places, 248 transitions, 3063 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:16:07,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 275 transitions, 4191 flow [2024-06-04 16:16:08,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 275 transitions, 3846 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:08,774 INFO L231 Difference]: Finished difference. Result has 232 places, 254 transitions, 3086 flow [2024-06-04 16:16:08,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3086, PETRI_PLACES=232, PETRI_TRANSITIONS=254} [2024-06-04 16:16:08,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-04 16:16:08,775 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 254 transitions, 3086 flow [2024-06-04 16:16:08,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:08,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:08,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:08,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 16:16:08,776 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:08,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:08,776 INFO L85 PathProgramCache]: Analyzing trace with hash -908165438, now seen corresponding path program 11 times [2024-06-04 16:16:08,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:08,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278371437] [2024-06-04 16:16:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:08,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:09,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:09,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278371437] [2024-06-04 16:16:09,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278371437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:09,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:09,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:09,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375095550] [2024-06-04 16:16:09,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:09,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:09,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:09,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:09,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:09,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:09,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 254 transitions, 3086 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:09,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:09,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:09,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:09,548 INFO L124 PetriNetUnfolderBase]: 1824/3131 cut-off events. [2024-06-04 16:16:09,549 INFO L125 PetriNetUnfolderBase]: For 239241/239241 co-relation queries the response was YES. [2024-06-04 16:16:09,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22544 conditions, 3131 events. 1824/3131 cut-off events. For 239241/239241 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19426 event pairs, 450 based on Foata normal form. 1/3124 useless extension candidates. Maximal degree in co-relation 22433. Up to 2608 conditions per place. [2024-06-04 16:16:09,579 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 149 selfloop transitions, 118 changer transitions 0/274 dead transitions. [2024-06-04 16:16:09,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 274 transitions, 3948 flow [2024-06-04 16:16:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:16:09,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 16:16:09,580 INFO L175 Difference]: Start difference. First operand has 232 places, 254 transitions, 3086 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:16:09,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 274 transitions, 3948 flow [2024-06-04 16:16:10,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 274 transitions, 3701 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:10,264 INFO L231 Difference]: Finished difference. Result has 236 places, 254 transitions, 3081 flow [2024-06-04 16:16:10,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3081, PETRI_PLACES=236, PETRI_TRANSITIONS=254} [2024-06-04 16:16:10,264 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-04 16:16:10,264 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 254 transitions, 3081 flow [2024-06-04 16:16:10,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:10,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:10,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:10,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 16:16:10,265 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:10,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:10,265 INFO L85 PathProgramCache]: Analyzing trace with hash -535019524, now seen corresponding path program 12 times [2024-06-04 16:16:10,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:10,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082311359] [2024-06-04 16:16:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:10,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:10,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:10,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082311359] [2024-06-04 16:16:10,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082311359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:10,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:10,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:10,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752797325] [2024-06-04 16:16:10,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:10,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:10,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:10,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:10,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:10,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:10,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 254 transitions, 3081 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:10,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:10,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:10,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:11,043 INFO L124 PetriNetUnfolderBase]: 1829/3157 cut-off events. [2024-06-04 16:16:11,043 INFO L125 PetriNetUnfolderBase]: For 245469/245469 co-relation queries the response was YES. [2024-06-04 16:16:11,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22679 conditions, 3157 events. 1829/3157 cut-off events. For 245469/245469 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 19602 event pairs, 456 based on Foata normal form. 1/3155 useless extension candidates. Maximal degree in co-relation 22567. Up to 2833 conditions per place. [2024-06-04 16:16:11,073 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 243 selfloop transitions, 22 changer transitions 0/272 dead transitions. [2024-06-04 16:16:11,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 272 transitions, 3738 flow [2024-06-04 16:16:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-04 16:16:11,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-04 16:16:11,074 INFO L175 Difference]: Start difference. First operand has 236 places, 254 transitions, 3081 flow. Second operand 7 states and 155 transitions. [2024-06-04 16:16:11,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 272 transitions, 3738 flow [2024-06-04 16:16:11,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 272 transitions, 3488 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:11,669 INFO L231 Difference]: Finished difference. Result has 236 places, 257 transitions, 2946 flow [2024-06-04 16:16:11,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2946, PETRI_PLACES=236, PETRI_TRANSITIONS=257} [2024-06-04 16:16:11,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-04 16:16:11,670 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 257 transitions, 2946 flow [2024-06-04 16:16:11,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:11,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:11,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:11,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 16:16:11,670 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:11,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:11,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1520613212, now seen corresponding path program 13 times [2024-06-04 16:16:11,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:11,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913624332] [2024-06-04 16:16:11,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:11,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:11,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:11,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913624332] [2024-06-04 16:16:11,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913624332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:11,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:11,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:11,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981094236] [2024-06-04 16:16:11,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:11,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:11,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:12,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:12,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 257 transitions, 2946 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:12,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:12,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:12,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:12,500 INFO L124 PetriNetUnfolderBase]: 1842/3166 cut-off events. [2024-06-04 16:16:12,501 INFO L125 PetriNetUnfolderBase]: For 254210/254210 co-relation queries the response was YES. [2024-06-04 16:16:12,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22726 conditions, 3166 events. 1842/3166 cut-off events. For 254210/254210 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 19700 event pairs, 452 based on Foata normal form. 1/3159 useless extension candidates. Maximal degree in co-relation 22613. Up to 2629 conditions per place. [2024-06-04 16:16:12,533 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 148 selfloop transitions, 126 changer transitions 0/281 dead transitions. [2024-06-04 16:16:12,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 281 transitions, 4062 flow [2024-06-04 16:16:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:12,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:12,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:16:12,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-04 16:16:12,534 INFO L175 Difference]: Start difference. First operand has 236 places, 257 transitions, 2946 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:16:12,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 281 transitions, 4062 flow [2024-06-04 16:16:13,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 281 transitions, 3996 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:13,338 INFO L231 Difference]: Finished difference. Result has 239 places, 263 transitions, 3232 flow [2024-06-04 16:16:13,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2880, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3232, PETRI_PLACES=239, PETRI_TRANSITIONS=263} [2024-06-04 16:16:13,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-04 16:16:13,339 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 263 transitions, 3232 flow [2024-06-04 16:16:13,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:13,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:13,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:13,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 16:16:13,340 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:13,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1566411184, now seen corresponding path program 14 times [2024-06-04 16:16:13,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:13,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158179595] [2024-06-04 16:16:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:13,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:13,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:13,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158179595] [2024-06-04 16:16:13,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158179595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:13,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:13,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:13,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513538483] [2024-06-04 16:16:13,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:13,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:13,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:13,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:13,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:13,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 263 transitions, 3232 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:13,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:13,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:13,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:14,103 INFO L124 PetriNetUnfolderBase]: 1839/3162 cut-off events. [2024-06-04 16:16:14,103 INFO L125 PetriNetUnfolderBase]: For 258804/258804 co-relation queries the response was YES. [2024-06-04 16:16:14,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22948 conditions, 3162 events. 1839/3162 cut-off events. For 258804/258804 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 19667 event pairs, 452 based on Foata normal form. 1/3155 useless extension candidates. Maximal degree in co-relation 22834. Up to 2626 conditions per place. [2024-06-04 16:16:14,134 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 146 selfloop transitions, 127 changer transitions 0/280 dead transitions. [2024-06-04 16:16:14,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 280 transitions, 4110 flow [2024-06-04 16:16:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 16:16:14,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:16:14,136 INFO L175 Difference]: Start difference. First operand has 239 places, 263 transitions, 3232 flow. Second operand 8 states and 184 transitions. [2024-06-04 16:16:14,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 280 transitions, 4110 flow [2024-06-04 16:16:14,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 280 transitions, 3701 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:14,921 INFO L231 Difference]: Finished difference. Result has 241 places, 263 transitions, 3083 flow [2024-06-04 16:16:14,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3083, PETRI_PLACES=241, PETRI_TRANSITIONS=263} [2024-06-04 16:16:14,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-04 16:16:14,922 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 263 transitions, 3083 flow [2024-06-04 16:16:14,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:14,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:14,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:14,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 16:16:14,922 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:14,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:14,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1439820618, now seen corresponding path program 15 times [2024-06-04 16:16:14,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:14,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721115851] [2024-06-04 16:16:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:14,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:15,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:15,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721115851] [2024-06-04 16:16:15,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721115851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:15,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:15,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:15,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621432802] [2024-06-04 16:16:15,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:15,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:15,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:15,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:15,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:15,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:15,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 263 transitions, 3083 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:15,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:15,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:15,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:15,719 INFO L124 PetriNetUnfolderBase]: 1836/3171 cut-off events. [2024-06-04 16:16:15,719 INFO L125 PetriNetUnfolderBase]: For 261496/261496 co-relation queries the response was YES. [2024-06-04 16:16:15,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22698 conditions, 3171 events. 1836/3171 cut-off events. For 261496/261496 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 19701 event pairs, 456 based on Foata normal form. 1/3169 useless extension candidates. Maximal degree in co-relation 22584. Up to 2837 conditions per place. [2024-06-04 16:16:15,750 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 27 changer transitions 0/279 dead transitions. [2024-06-04 16:16:15,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 279 transitions, 3697 flow [2024-06-04 16:16:15,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-04 16:16:15,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-04 16:16:15,751 INFO L175 Difference]: Start difference. First operand has 241 places, 263 transitions, 3083 flow. Second operand 8 states and 173 transitions. [2024-06-04 16:16:15,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 279 transitions, 3697 flow [2024-06-04 16:16:16,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 279 transitions, 3390 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:16,636 INFO L231 Difference]: Finished difference. Result has 242 places, 263 transitions, 2836 flow [2024-06-04 16:16:16,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2836, PETRI_PLACES=242, PETRI_TRANSITIONS=263} [2024-06-04 16:16:16,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-04 16:16:16,636 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 263 transitions, 2836 flow [2024-06-04 16:16:16,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:16,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:16,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:16,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 16:16:16,637 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:16,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1466318664, now seen corresponding path program 16 times [2024-06-04 16:16:16,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:16,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948077066] [2024-06-04 16:16:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:16,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:16,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:16,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948077066] [2024-06-04 16:16:16,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948077066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:16,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:16,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:16,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545059083] [2024-06-04 16:16:16,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:16,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:16,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:16,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:16,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:16,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:16,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 263 transitions, 2836 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:16,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:16,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:16,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:17,471 INFO L124 PetriNetUnfolderBase]: 1839/3175 cut-off events. [2024-06-04 16:16:17,471 INFO L125 PetriNetUnfolderBase]: For 264485/264485 co-relation queries the response was YES. [2024-06-04 16:16:17,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22498 conditions, 3175 events. 1839/3175 cut-off events. For 264485/264485 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 19774 event pairs, 428 based on Foata normal form. 1/3173 useless extension candidates. Maximal degree in co-relation 22383. Up to 2742 conditions per place. [2024-06-04 16:16:17,503 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 232 selfloop transitions, 60 changer transitions 0/299 dead transitions. [2024-06-04 16:16:17,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 299 transitions, 3744 flow [2024-06-04 16:16:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 16:16:17,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-04 16:16:17,504 INFO L175 Difference]: Start difference. First operand has 242 places, 263 transitions, 2836 flow. Second operand 8 states and 199 transitions. [2024-06-04 16:16:17,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 299 transitions, 3744 flow [2024-06-04 16:16:18,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 299 transitions, 3648 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:18,482 INFO L231 Difference]: Finished difference. Result has 244 places, 268 transitions, 3011 flow [2024-06-04 16:16:18,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3011, PETRI_PLACES=244, PETRI_TRANSITIONS=268} [2024-06-04 16:16:18,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-04 16:16:18,483 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 268 transitions, 3011 flow [2024-06-04 16:16:18,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:18,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:18,483 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, 1] [2024-06-04 16:16:18,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 16:16:18,484 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:18,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:18,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1050519252, now seen corresponding path program 17 times [2024-06-04 16:16:18,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:18,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847696311] [2024-06-04 16:16:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:18,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:18,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:18,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847696311] [2024-06-04 16:16:18,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847696311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:18,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:18,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:18,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423639505] [2024-06-04 16:16:18,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:18,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:18,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:18,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:18,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:18,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:18,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 268 transitions, 3011 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:18,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:18,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:18,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:19,369 INFO L124 PetriNetUnfolderBase]: 1836/3175 cut-off events. [2024-06-04 16:16:19,369 INFO L125 PetriNetUnfolderBase]: For 268694/268694 co-relation queries the response was YES. [2024-06-04 16:16:19,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22699 conditions, 3175 events. 1836/3175 cut-off events. For 268694/268694 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19749 event pairs, 430 based on Foata normal form. 1/3173 useless extension candidates. Maximal degree in co-relation 22581. Up to 2739 conditions per place. [2024-06-04 16:16:19,395 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 59 changer transitions 0/295 dead transitions. [2024-06-04 16:16:19,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 295 transitions, 3807 flow [2024-06-04 16:16:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 16:16:19,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-04 16:16:19,396 INFO L175 Difference]: Start difference. First operand has 244 places, 268 transitions, 3011 flow. Second operand 7 states and 177 transitions. [2024-06-04 16:16:19,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 295 transitions, 3807 flow [2024-06-04 16:16:20,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 295 transitions, 3554 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-04 16:16:20,021 INFO L231 Difference]: Finished difference. Result has 242 places, 268 transitions, 2891 flow [2024-06-04 16:16:20,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2891, PETRI_PLACES=242, PETRI_TRANSITIONS=268} [2024-06-04 16:16:20,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-04 16:16:20,037 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 268 transitions, 2891 flow [2024-06-04 16:16:20,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:20,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:20,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:20,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 16:16:20,038 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:20,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1050696882, now seen corresponding path program 18 times [2024-06-04 16:16:20,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:20,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017215806] [2024-06-04 16:16:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:20,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:20,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:20,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017215806] [2024-06-04 16:16:20,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017215806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:20,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:20,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:20,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900602164] [2024-06-04 16:16:20,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:20,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:20,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:20,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:20,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:20,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:20,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 268 transitions, 2891 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:20,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:20,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:20,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:20,865 INFO L124 PetriNetUnfolderBase]: 1833/3171 cut-off events. [2024-06-04 16:16:20,865 INFO L125 PetriNetUnfolderBase]: For 258204/258204 co-relation queries the response was YES. [2024-06-04 16:16:20,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22419 conditions, 3171 events. 1833/3171 cut-off events. For 258204/258204 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19780 event pairs, 453 based on Foata normal form. 1/3169 useless extension candidates. Maximal degree in co-relation 22301. Up to 2812 conditions per place. [2024-06-04 16:16:20,896 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 260 selfloop transitions, 23 changer transitions 0/290 dead transitions. [2024-06-04 16:16:20,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 290 transitions, 3513 flow [2024-06-04 16:16:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:16:20,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:16:20,898 INFO L175 Difference]: Start difference. First operand has 242 places, 268 transitions, 2891 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:16:20,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 290 transitions, 3513 flow [2024-06-04 16:16:21,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 290 transitions, 3313 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:21,589 INFO L231 Difference]: Finished difference. Result has 240 places, 268 transitions, 2743 flow [2024-06-04 16:16:21,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2691, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2743, PETRI_PLACES=240, PETRI_TRANSITIONS=268} [2024-06-04 16:16:21,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-04 16:16:21,589 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 268 transitions, 2743 flow [2024-06-04 16:16:21,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:21,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:21,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:21,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 16:16:21,590 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:21,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:21,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1483778738, now seen corresponding path program 7 times [2024-06-04 16:16:21,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:21,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500170020] [2024-06-04 16:16:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:21,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:21,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:21,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500170020] [2024-06-04 16:16:21,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500170020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:21,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:21,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:21,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786314234] [2024-06-04 16:16:21,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:21,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:21,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:21,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:21,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:21,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:21,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 268 transitions, 2743 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:21,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:21,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:21,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:22,434 INFO L124 PetriNetUnfolderBase]: 1899/3258 cut-off events. [2024-06-04 16:16:22,435 INFO L125 PetriNetUnfolderBase]: For 303045/303045 co-relation queries the response was YES. [2024-06-04 16:16:22,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23623 conditions, 3258 events. 1899/3258 cut-off events. For 303045/303045 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20335 event pairs, 477 based on Foata normal form. 6/3256 useless extension candidates. Maximal degree in co-relation 23504. Up to 2692 conditions per place. [2024-06-04 16:16:22,467 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 59 changer transitions 0/299 dead transitions. [2024-06-04 16:16:22,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 299 transitions, 3656 flow [2024-06-04 16:16:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:16:22,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-04 16:16:22,468 INFO L175 Difference]: Start difference. First operand has 240 places, 268 transitions, 2743 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:16:22,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 299 transitions, 3656 flow [2024-06-04 16:16:23,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 299 transitions, 3587 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:23,402 INFO L231 Difference]: Finished difference. Result has 243 places, 271 transitions, 2877 flow [2024-06-04 16:16:23,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2674, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2877, PETRI_PLACES=243, PETRI_TRANSITIONS=271} [2024-06-04 16:16:23,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-04 16:16:23,403 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 271 transitions, 2877 flow [2024-06-04 16:16:23,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:23,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:23,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:23,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 16:16:23,404 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:23,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:23,404 INFO L85 PathProgramCache]: Analyzing trace with hash -544107378, now seen corresponding path program 8 times [2024-06-04 16:16:23,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:23,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688937469] [2024-06-04 16:16:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:23,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:23,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:23,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688937469] [2024-06-04 16:16:23,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688937469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:23,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:23,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:23,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348579611] [2024-06-04 16:16:23,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:23,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:23,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:23,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:23,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 271 transitions, 2877 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:23,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:23,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:23,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:24,319 INFO L124 PetriNetUnfolderBase]: 1965/3372 cut-off events. [2024-06-04 16:16:24,320 INFO L125 PetriNetUnfolderBase]: For 336725/336725 co-relation queries the response was YES. [2024-06-04 16:16:24,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25320 conditions, 3372 events. 1965/3372 cut-off events. For 336725/336725 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21226 event pairs, 499 based on Foata normal form. 6/3370 useless extension candidates. Maximal degree in co-relation 25199. Up to 2657 conditions per place. [2024-06-04 16:16:24,352 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 84 changer transitions 0/303 dead transitions. [2024-06-04 16:16:24,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 303 transitions, 3787 flow [2024-06-04 16:16:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:16:24,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-04 16:16:24,353 INFO L175 Difference]: Start difference. First operand has 243 places, 271 transitions, 2877 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:16:24,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 303 transitions, 3787 flow [2024-06-04 16:16:25,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 303 transitions, 3704 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 16:16:25,533 INFO L231 Difference]: Finished difference. Result has 248 places, 273 transitions, 3016 flow [2024-06-04 16:16:25,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2794, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3016, PETRI_PLACES=248, PETRI_TRANSITIONS=273} [2024-06-04 16:16:25,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-04 16:16:25,533 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 273 transitions, 3016 flow [2024-06-04 16:16:25,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:25,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:25,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:25,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 16:16:25,534 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:25,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:25,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1483630868, now seen corresponding path program 9 times [2024-06-04 16:16:25,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:25,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502324655] [2024-06-04 16:16:25,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:25,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:25,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:25,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502324655] [2024-06-04 16:16:25,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502324655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:25,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:25,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:25,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769250499] [2024-06-04 16:16:25,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:25,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:25,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:25,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:25,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:25,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 273 transitions, 3016 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:25,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:25,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:25,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:26,380 INFO L124 PetriNetUnfolderBase]: 1947/3349 cut-off events. [2024-06-04 16:16:26,381 INFO L125 PetriNetUnfolderBase]: For 327867/327867 co-relation queries the response was YES. [2024-06-04 16:16:26,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24808 conditions, 3349 events. 1947/3349 cut-off events. For 327867/327867 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21069 event pairs, 504 based on Foata normal form. 8/3349 useless extension candidates. Maximal degree in co-relation 24685. Up to 2888 conditions per place. [2024-06-04 16:16:26,415 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 232 selfloop transitions, 55 changer transitions 0/294 dead transitions. [2024-06-04 16:16:26,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 294 transitions, 3672 flow [2024-06-04 16:16:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:16:26,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:16:26,416 INFO L175 Difference]: Start difference. First operand has 248 places, 273 transitions, 3016 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:16:26,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 294 transitions, 3672 flow [2024-06-04 16:16:27,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 294 transitions, 3548 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:27,384 INFO L231 Difference]: Finished difference. Result has 251 places, 273 transitions, 3007 flow [2024-06-04 16:16:27,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3007, PETRI_PLACES=251, PETRI_TRANSITIONS=273} [2024-06-04 16:16:27,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-04 16:16:27,385 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 273 transitions, 3007 flow [2024-06-04 16:16:27,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:27,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:27,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:27,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 16:16:27,385 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:27,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:27,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1497714510, now seen corresponding path program 10 times [2024-06-04 16:16:27,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:27,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804989788] [2024-06-04 16:16:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:27,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:27,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:27,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804989788] [2024-06-04 16:16:27,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804989788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:27,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:27,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:27,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552939673] [2024-06-04 16:16:27,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:27,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:27,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:27,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:27,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:27,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 273 transitions, 3007 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:27,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:27,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:27,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:28,382 INFO L124 PetriNetUnfolderBase]: 2013/3459 cut-off events. [2024-06-04 16:16:28,382 INFO L125 PetriNetUnfolderBase]: For 354295/354295 co-relation queries the response was YES. [2024-06-04 16:16:28,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26181 conditions, 3459 events. 2013/3459 cut-off events. For 354295/354295 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21893 event pairs, 518 based on Foata normal form. 6/3457 useless extension candidates. Maximal degree in co-relation 26056. Up to 2915 conditions per place. [2024-06-04 16:16:28,421 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 216 selfloop transitions, 78 changer transitions 0/301 dead transitions. [2024-06-04 16:16:28,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 301 transitions, 3907 flow [2024-06-04 16:16:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:28,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:16:28,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 16:16:28,423 INFO L175 Difference]: Start difference. First operand has 251 places, 273 transitions, 3007 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:16:28,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 301 transitions, 3907 flow [2024-06-04 16:16:29,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 301 transitions, 3800 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:29,614 INFO L231 Difference]: Finished difference. Result has 254 places, 275 transitions, 3110 flow [2024-06-04 16:16:29,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2900, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3110, PETRI_PLACES=254, PETRI_TRANSITIONS=275} [2024-06-04 16:16:29,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-04 16:16:29,615 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 275 transitions, 3110 flow [2024-06-04 16:16:29,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:29,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:29,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:29,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 16:16:29,615 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:29,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash -455393748, now seen corresponding path program 11 times [2024-06-04 16:16:29,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:29,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505956979] [2024-06-04 16:16:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:29,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:29,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:29,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505956979] [2024-06-04 16:16:29,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505956979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:29,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:29,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:29,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153025619] [2024-06-04 16:16:29,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:29,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:29,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:29,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:29,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:29,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:29,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 275 transitions, 3110 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:29,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:29,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:29,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:30,512 INFO L124 PetriNetUnfolderBase]: 1995/3429 cut-off events. [2024-06-04 16:16:30,512 INFO L125 PetriNetUnfolderBase]: For 344383/344383 co-relation queries the response was YES. [2024-06-04 16:16:30,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25566 conditions, 3429 events. 1995/3429 cut-off events. For 344383/344383 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 21637 event pairs, 514 based on Foata normal form. 8/3429 useless extension candidates. Maximal degree in co-relation 25440. Up to 2937 conditions per place. [2024-06-04 16:16:30,548 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 214 selfloop transitions, 76 changer transitions 0/297 dead transitions. [2024-06-04 16:16:30,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 297 transitions, 3774 flow [2024-06-04 16:16:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 16:16:30,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:16:30,549 INFO L175 Difference]: Start difference. First operand has 254 places, 275 transitions, 3110 flow. Second operand 8 states and 184 transitions. [2024-06-04 16:16:30,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 297 transitions, 3774 flow [2024-06-04 16:16:31,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 297 transitions, 3661 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:31,478 INFO L231 Difference]: Finished difference. Result has 258 places, 275 transitions, 3154 flow [2024-06-04 16:16:31,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2997, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3154, PETRI_PLACES=258, PETRI_TRANSITIONS=275} [2024-06-04 16:16:31,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-04 16:16:31,479 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 275 transitions, 3154 flow [2024-06-04 16:16:31,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:31,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:31,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:31,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 16:16:31,479 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:31,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash -539369630, now seen corresponding path program 12 times [2024-06-04 16:16:31,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:31,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348687628] [2024-06-04 16:16:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:31,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:31,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:31,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348687628] [2024-06-04 16:16:31,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348687628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:31,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:31,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:31,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866871369] [2024-06-04 16:16:31,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:31,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:31,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:31,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:31,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:31,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:31,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 275 transitions, 3154 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:31,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:31,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:31,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:32,407 INFO L124 PetriNetUnfolderBase]: 2061/3551 cut-off events. [2024-06-04 16:16:32,407 INFO L125 PetriNetUnfolderBase]: For 370753/370753 co-relation queries the response was YES. [2024-06-04 16:16:32,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27063 conditions, 3551 events. 2061/3551 cut-off events. For 370753/370753 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22619 event pairs, 407 based on Foata normal form. 6/3549 useless extension candidates. Maximal degree in co-relation 26935. Up to 2408 conditions per place. [2024-06-04 16:16:32,446 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 236 selfloop transitions, 69 changer transitions 0/312 dead transitions. [2024-06-04 16:16:32,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 312 transitions, 4312 flow [2024-06-04 16:16:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 16:16:32,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-04 16:16:32,447 INFO L175 Difference]: Start difference. First operand has 258 places, 275 transitions, 3154 flow. Second operand 7 states and 179 transitions. [2024-06-04 16:16:32,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 312 transitions, 4312 flow [2024-06-04 16:16:33,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 312 transitions, 4155 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:33,830 INFO L231 Difference]: Finished difference. Result has 258 places, 277 transitions, 3189 flow [2024-06-04 16:16:33,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2997, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3189, PETRI_PLACES=258, PETRI_TRANSITIONS=277} [2024-06-04 16:16:33,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-04 16:16:33,831 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 277 transitions, 3189 flow [2024-06-04 16:16:33,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:33,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:33,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:33,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 16:16:33,832 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:33,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:33,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1217665748, now seen corresponding path program 13 times [2024-06-04 16:16:33,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:33,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353203696] [2024-06-04 16:16:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:33,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:34,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:34,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353203696] [2024-06-04 16:16:34,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353203696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:34,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:34,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:34,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425517086] [2024-06-04 16:16:34,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:34,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:34,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:34,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:34,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:34,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:34,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 277 transitions, 3189 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:34,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:34,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:34,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:34,777 INFO L124 PetriNetUnfolderBase]: 2101/3628 cut-off events. [2024-06-04 16:16:34,778 INFO L125 PetriNetUnfolderBase]: For 382006/382006 co-relation queries the response was YES. [2024-06-04 16:16:34,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27768 conditions, 3628 events. 2101/3628 cut-off events. For 382006/382006 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 23256 event pairs, 451 based on Foata normal form. 6/3631 useless extension candidates. Maximal degree in co-relation 27639. Up to 3151 conditions per place. [2024-06-04 16:16:34,816 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 278 selfloop transitions, 21 changer transitions 0/306 dead transitions. [2024-06-04 16:16:34,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 306 transitions, 3947 flow [2024-06-04 16:16:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:16:34,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:16:34,818 INFO L175 Difference]: Start difference. First operand has 258 places, 277 transitions, 3189 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:16:34,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 306 transitions, 3947 flow [2024-06-04 16:16:35,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 306 transitions, 3822 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 16:16:35,821 INFO L231 Difference]: Finished difference. Result has 262 places, 279 transitions, 3150 flow [2024-06-04 16:16:35,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3071, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3150, PETRI_PLACES=262, PETRI_TRANSITIONS=279} [2024-06-04 16:16:35,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-04 16:16:35,821 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 279 transitions, 3150 flow [2024-06-04 16:16:35,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:35,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:35,822 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] [2024-06-04 16:16:35,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 16:16:35,822 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:35,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2070267498, now seen corresponding path program 14 times [2024-06-04 16:16:35,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:35,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673738008] [2024-06-04 16:16:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:35,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:36,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:36,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673738008] [2024-06-04 16:16:36,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673738008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:36,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:36,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:36,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666271794] [2024-06-04 16:16:36,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:36,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:36,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:36,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:36,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:36,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 279 transitions, 3150 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:36,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:36,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:36,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:36,789 INFO L124 PetriNetUnfolderBase]: 2154/3722 cut-off events. [2024-06-04 16:16:36,790 INFO L125 PetriNetUnfolderBase]: For 409695/409695 co-relation queries the response was YES. [2024-06-04 16:16:36,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28835 conditions, 3722 events. 2154/3722 cut-off events. For 409695/409695 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24008 event pairs, 445 based on Foata normal form. 6/3720 useless extension candidates. Maximal degree in co-relation 28704. Up to 2020 conditions per place. [2024-06-04 16:16:36,827 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 204 selfloop transitions, 107 changer transitions 0/318 dead transitions. [2024-06-04 16:16:36,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 318 transitions, 4336 flow [2024-06-04 16:16:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 16:16:36,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-04 16:16:36,829 INFO L175 Difference]: Start difference. First operand has 262 places, 279 transitions, 3150 flow. Second operand 8 states and 197 transitions. [2024-06-04 16:16:36,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 318 transitions, 4336 flow [2024-06-04 16:16:38,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 318 transitions, 4280 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:38,163 INFO L231 Difference]: Finished difference. Result has 266 places, 281 transitions, 3366 flow [2024-06-04 16:16:38,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3366, PETRI_PLACES=266, PETRI_TRANSITIONS=281} [2024-06-04 16:16:38,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-04 16:16:38,163 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 281 transitions, 3366 flow [2024-06-04 16:16:38,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:38,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:38,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:38,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 16:16:38,164 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:38,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:38,164 INFO L85 PathProgramCache]: Analyzing trace with hash -166782942, now seen corresponding path program 15 times [2024-06-04 16:16:38,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:38,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218802070] [2024-06-04 16:16:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:38,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:38,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:38,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218802070] [2024-06-04 16:16:38,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218802070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:38,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:38,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:38,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551383783] [2024-06-04 16:16:38,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:38,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:38,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:38,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:38,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:38,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:38,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 281 transitions, 3366 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:38,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:38,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:38,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:39,086 INFO L124 PetriNetUnfolderBase]: 2207/3802 cut-off events. [2024-06-04 16:16:39,086 INFO L125 PetriNetUnfolderBase]: For 444015/444015 co-relation queries the response was YES. [2024-06-04 16:16:39,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30563 conditions, 3802 events. 2207/3802 cut-off events. For 444015/444015 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24641 event pairs, 492 based on Foata normal form. 6/3800 useless extension candidates. Maximal degree in co-relation 30431. Up to 2050 conditions per place. [2024-06-04 16:16:39,281 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 204 selfloop transitions, 107 changer transitions 0/318 dead transitions. [2024-06-04 16:16:39,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 318 transitions, 4550 flow [2024-06-04 16:16:39,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:39,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:39,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:16:39,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-04 16:16:39,283 INFO L175 Difference]: Start difference. First operand has 266 places, 281 transitions, 3366 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:16:39,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 318 transitions, 4550 flow [2024-06-04 16:16:41,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 318 transitions, 4308 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:41,094 INFO L231 Difference]: Finished difference. Result has 269 places, 283 transitions, 3398 flow [2024-06-04 16:16:41,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3136, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3398, PETRI_PLACES=269, PETRI_TRANSITIONS=283} [2024-06-04 16:16:41,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-04 16:16:41,095 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 283 transitions, 3398 flow [2024-06-04 16:16:41,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:41,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:41,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:41,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 16:16:41,095 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:41,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:41,096 INFO L85 PathProgramCache]: Analyzing trace with hash -856922040, now seen corresponding path program 16 times [2024-06-04 16:16:41,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:41,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882789653] [2024-06-04 16:16:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:41,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:41,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:41,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882789653] [2024-06-04 16:16:41,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882789653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:41,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:41,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:41,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588637207] [2024-06-04 16:16:41,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:41,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:41,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:41,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:41,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:41,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:41,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 283 transitions, 3398 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:41,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:41,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:41,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:42,064 INFO L124 PetriNetUnfolderBase]: 2194/3797 cut-off events. [2024-06-04 16:16:42,064 INFO L125 PetriNetUnfolderBase]: For 430444/430444 co-relation queries the response was YES. [2024-06-04 16:16:42,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29988 conditions, 3797 events. 2194/3797 cut-off events. For 430444/430444 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24694 event pairs, 464 based on Foata normal form. 6/3800 useless extension candidates. Maximal degree in co-relation 29855. Up to 3218 conditions per place. [2024-06-04 16:16:42,104 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 276 selfloop transitions, 29 changer transitions 0/312 dead transitions. [2024-06-04 16:16:42,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 312 transitions, 4134 flow [2024-06-04 16:16:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:42,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:16:42,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-04 16:16:42,106 INFO L175 Difference]: Start difference. First operand has 269 places, 283 transitions, 3398 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:16:42,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 312 transitions, 4134 flow [2024-06-04 16:16:43,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 312 transitions, 3965 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:43,799 INFO L231 Difference]: Finished difference. Result has 273 places, 283 transitions, 3291 flow [2024-06-04 16:16:43,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3291, PETRI_PLACES=273, PETRI_TRANSITIONS=283} [2024-06-04 16:16:43,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-04 16:16:43,799 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 283 transitions, 3291 flow [2024-06-04 16:16:43,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:43,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:43,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:43,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 16:16:43,800 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:43,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:43,801 INFO L85 PathProgramCache]: Analyzing trace with hash -457259702, now seen corresponding path program 17 times [2024-06-04 16:16:43,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:43,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337017128] [2024-06-04 16:16:43,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:43,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:44,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:44,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337017128] [2024-06-04 16:16:44,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337017128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:44,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:44,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:44,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828386133] [2024-06-04 16:16:44,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:44,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:44,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:44,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:44,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:44,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:44,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 283 transitions, 3291 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:44,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:44,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:44,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:44,765 INFO L124 PetriNetUnfolderBase]: 2296/3970 cut-off events. [2024-06-04 16:16:44,765 INFO L125 PetriNetUnfolderBase]: For 478504/478504 co-relation queries the response was YES. [2024-06-04 16:16:44,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31441 conditions, 3970 events. 2296/3970 cut-off events. For 478504/478504 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 26077 event pairs, 596 based on Foata normal form. 8/3975 useless extension candidates. Maximal degree in co-relation 31307. Up to 3443 conditions per place. [2024-06-04 16:16:44,807 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 281 selfloop transitions, 22 changer transitions 0/310 dead transitions. [2024-06-04 16:16:44,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 310 transitions, 4253 flow [2024-06-04 16:16:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 16:16:44,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-04 16:16:44,808 INFO L175 Difference]: Start difference. First operand has 273 places, 283 transitions, 3291 flow. Second operand 8 states and 179 transitions. [2024-06-04 16:16:44,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 310 transitions, 4253 flow [2024-06-04 16:16:46,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 310 transitions, 4144 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:46,546 INFO L231 Difference]: Finished difference. Result has 274 places, 286 transitions, 3308 flow [2024-06-04 16:16:46,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3184, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3308, PETRI_PLACES=274, PETRI_TRANSITIONS=286} [2024-06-04 16:16:46,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-04 16:16:46,547 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 286 transitions, 3308 flow [2024-06-04 16:16:46,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:46,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:46,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:46,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 16:16:46,547 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:46,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash -853709402, now seen corresponding path program 18 times [2024-06-04 16:16:46,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:46,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500674000] [2024-06-04 16:16:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:46,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:46,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:46,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500674000] [2024-06-04 16:16:46,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500674000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:46,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:46,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:46,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545487505] [2024-06-04 16:16:46,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:46,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:46,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:46,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:46,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 286 transitions, 3308 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:46,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:46,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:46,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:47,502 INFO L124 PetriNetUnfolderBase]: 2278/3962 cut-off events. [2024-06-04 16:16:47,502 INFO L125 PetriNetUnfolderBase]: For 460142/460142 co-relation queries the response was YES. [2024-06-04 16:16:47,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30658 conditions, 3962 events. 2278/3962 cut-off events. For 460142/460142 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 26115 event pairs, 606 based on Foata normal form. 8/3967 useless extension candidates. Maximal degree in co-relation 30522. Up to 3511 conditions per place. [2024-06-04 16:16:47,544 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 277 selfloop transitions, 20 changer transitions 0/304 dead transitions. [2024-06-04 16:16:47,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 304 transitions, 3976 flow [2024-06-04 16:16:47,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-04 16:16:47,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-04 16:16:47,546 INFO L175 Difference]: Start difference. First operand has 274 places, 286 transitions, 3308 flow. Second operand 7 states and 157 transitions. [2024-06-04 16:16:47,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 304 transitions, 3976 flow [2024-06-04 16:16:49,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 304 transitions, 3918 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:49,477 INFO L231 Difference]: Finished difference. Result has 276 places, 286 transitions, 3295 flow [2024-06-04 16:16:49,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3250, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3295, PETRI_PLACES=276, PETRI_TRANSITIONS=286} [2024-06-04 16:16:49,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-04 16:16:49,478 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 286 transitions, 3295 flow [2024-06-04 16:16:49,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:49,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:49,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:49,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 16:16:49,479 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:49,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash 954520718, now seen corresponding path program 19 times [2024-06-04 16:16:49,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:49,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407087274] [2024-06-04 16:16:49,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:49,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:49,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:49,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407087274] [2024-06-04 16:16:49,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407087274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:49,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:49,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:49,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206451750] [2024-06-04 16:16:49,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:49,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:49,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:49,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:49,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:49,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:49,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 286 transitions, 3295 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:49,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:49,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:49,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:50,483 INFO L124 PetriNetUnfolderBase]: 2298/3994 cut-off events. [2024-06-04 16:16:50,483 INFO L125 PetriNetUnfolderBase]: For 459582/459582 co-relation queries the response was YES. [2024-06-04 16:16:50,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30809 conditions, 3994 events. 2298/3994 cut-off events. For 459582/459582 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 26472 event pairs, 609 based on Foata normal form. 6/3992 useless extension candidates. Maximal degree in co-relation 30672. Up to 3122 conditions per place. [2024-06-04 16:16:50,527 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 223 selfloop transitions, 85 changer transitions 0/315 dead transitions. [2024-06-04 16:16:50,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 315 transitions, 4426 flow [2024-06-04 16:16:50,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:16:50,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-04 16:16:50,528 INFO L175 Difference]: Start difference. First operand has 276 places, 286 transitions, 3295 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:16:50,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 315 transitions, 4426 flow [2024-06-04 16:16:52,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 315 transitions, 4389 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:52,701 INFO L231 Difference]: Finished difference. Result has 279 places, 287 transitions, 3455 flow [2024-06-04 16:16:52,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3258, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3455, PETRI_PLACES=279, PETRI_TRANSITIONS=287} [2024-06-04 16:16:52,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-04 16:16:52,702 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 287 transitions, 3455 flow [2024-06-04 16:16:52,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:52,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:52,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:52,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 16:16:52,702 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:52,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:52,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1300082930, now seen corresponding path program 20 times [2024-06-04 16:16:52,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:52,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690509737] [2024-06-04 16:16:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:52,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:52,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:52,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690509737] [2024-06-04 16:16:52,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690509737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:52,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:52,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:52,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476278407] [2024-06-04 16:16:52,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:52,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:52,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:52,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:52,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:53,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:53,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 287 transitions, 3455 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:53,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:53,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:53,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:53,707 INFO L124 PetriNetUnfolderBase]: 2338/4068 cut-off events. [2024-06-04 16:16:53,708 INFO L125 PetriNetUnfolderBase]: For 472795/472795 co-relation queries the response was YES. [2024-06-04 16:16:53,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31606 conditions, 4068 events. 2338/4068 cut-off events. For 472795/472795 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 27035 event pairs, 604 based on Foata normal form. 6/4071 useless extension candidates. Maximal degree in co-relation 31468. Up to 3542 conditions per place. [2024-06-04 16:16:53,752 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 282 selfloop transitions, 25 changer transitions 0/314 dead transitions. [2024-06-04 16:16:53,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 314 transitions, 4225 flow [2024-06-04 16:16:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 16:16:53,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-04 16:16:53,753 INFO L175 Difference]: Start difference. First operand has 279 places, 287 transitions, 3455 flow. Second operand 8 states and 179 transitions. [2024-06-04 16:16:53,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 314 transitions, 4225 flow [2024-06-04 16:16:55,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 314 transitions, 3892 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:55,826 INFO L231 Difference]: Finished difference. Result has 279 places, 289 transitions, 3218 flow [2024-06-04 16:16:55,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3128, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3218, PETRI_PLACES=279, PETRI_TRANSITIONS=289} [2024-06-04 16:16:55,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-04 16:16:55,826 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 289 transitions, 3218 flow [2024-06-04 16:16:55,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:55,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:55,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:55,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 16:16:55,827 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:55,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:55,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1566195920, now seen corresponding path program 21 times [2024-06-04 16:16:55,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:55,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003621678] [2024-06-04 16:16:55,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:55,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:56,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:56,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003621678] [2024-06-04 16:16:56,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003621678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:56,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:56,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:56,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649140075] [2024-06-04 16:16:56,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:56,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:56,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:56,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:56,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:56,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:56,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 289 transitions, 3218 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:56,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:56,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:56,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:56,809 INFO L124 PetriNetUnfolderBase]: 2358/4102 cut-off events. [2024-06-04 16:16:56,809 INFO L125 PetriNetUnfolderBase]: For 477781/477781 co-relation queries the response was YES. [2024-06-04 16:16:56,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30910 conditions, 4102 events. 2358/4102 cut-off events. For 477781/477781 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 27419 event pairs, 657 based on Foata normal form. 6/4100 useless extension candidates. Maximal degree in co-relation 30773. Up to 3458 conditions per place. [2024-06-04 16:16:56,856 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 77 changer transitions 0/313 dead transitions. [2024-06-04 16:16:56,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 313 transitions, 4131 flow [2024-06-04 16:16:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:16:56,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-04 16:16:56,857 INFO L175 Difference]: Start difference. First operand has 279 places, 289 transitions, 3218 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:16:56,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 313 transitions, 4131 flow [2024-06-04 16:16:58,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 313 transitions, 4003 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:58,468 INFO L231 Difference]: Finished difference. Result has 280 places, 290 transitions, 3271 flow [2024-06-04 16:16:58,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3271, PETRI_PLACES=280, PETRI_TRANSITIONS=290} [2024-06-04 16:16:58,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-04 16:16:58,469 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 290 transitions, 3271 flow [2024-06-04 16:16:58,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:58,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:58,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:58,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 16:16:58,469 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:58,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:58,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1566048050, now seen corresponding path program 22 times [2024-06-04 16:16:58,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:58,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330569926] [2024-06-04 16:16:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:58,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:58,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:58,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330569926] [2024-06-04 16:16:58,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330569926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:58,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:58,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:58,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675340634] [2024-06-04 16:16:58,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:58,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:58,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:58,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:58,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:58,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:16:58,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 290 transitions, 3271 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:58,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:58,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:16:58,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:59,502 INFO L124 PetriNetUnfolderBase]: 2386/4146 cut-off events. [2024-06-04 16:16:59,502 INFO L125 PetriNetUnfolderBase]: For 498028/498028 co-relation queries the response was YES. [2024-06-04 16:16:59,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31173 conditions, 4146 events. 2386/4146 cut-off events. For 498028/498028 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27710 event pairs, 667 based on Foata normal form. 8/4146 useless extension candidates. Maximal degree in co-relation 31037. Up to 3554 conditions per place. [2024-06-04 16:16:59,548 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 228 selfloop transitions, 75 changer transitions 0/310 dead transitions. [2024-06-04 16:16:59,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 310 transitions, 3978 flow [2024-06-04 16:16:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:16:59,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-04 16:16:59,550 INFO L175 Difference]: Start difference. First operand has 280 places, 290 transitions, 3271 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:16:59,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 310 transitions, 3978 flow [2024-06-04 16:17:01,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 310 transitions, 3699 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 16:17:01,637 INFO L231 Difference]: Finished difference. Result has 280 places, 291 transitions, 3174 flow [2024-06-04 16:17:01,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2997, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3174, PETRI_PLACES=280, PETRI_TRANSITIONS=291} [2024-06-04 16:17:01,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-04 16:17:01,638 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 291 transitions, 3174 flow [2024-06-04 16:17:01,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:01,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:01,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:01,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 16:17:01,638 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:01,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:01,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1988879796, now seen corresponding path program 23 times [2024-06-04 16:17:01,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:01,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003725025] [2024-06-04 16:17:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:01,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:01,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003725025] [2024-06-04 16:17:01,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003725025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:01,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:01,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:01,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026136431] [2024-06-04 16:17:01,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:01,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:01,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:01,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:01,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:02,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:02,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 291 transitions, 3174 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:02,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:02,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:02,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:02,655 INFO L124 PetriNetUnfolderBase]: 2368/4132 cut-off events. [2024-06-04 16:17:02,655 INFO L125 PetriNetUnfolderBase]: For 471731/471731 co-relation queries the response was YES. [2024-06-04 16:17:02,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30037 conditions, 4132 events. 2368/4132 cut-off events. For 471731/471731 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27615 event pairs, 622 based on Foata normal form. 8/4137 useless extension candidates. Maximal degree in co-relation 29901. Up to 3557 conditions per place. [2024-06-04 16:17:02,698 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 282 selfloop transitions, 27 changer transitions 0/316 dead transitions. [2024-06-04 16:17:02,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 316 transitions, 4096 flow [2024-06-04 16:17:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-04 16:17:02,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-04 16:17:02,706 INFO L175 Difference]: Start difference. First operand has 280 places, 291 transitions, 3174 flow. Second operand 9 states and 197 transitions. [2024-06-04 16:17:02,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 316 transitions, 4096 flow [2024-06-04 16:17:04,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 316 transitions, 3935 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:04,201 INFO L231 Difference]: Finished difference. Result has 283 places, 291 transitions, 3071 flow [2024-06-04 16:17:04,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3071, PETRI_PLACES=283, PETRI_TRANSITIONS=291} [2024-06-04 16:17:04,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-04 16:17:04,202 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 291 transitions, 3071 flow [2024-06-04 16:17:04,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:04,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:04,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:04,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 16:17:04,203 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:04,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:04,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1088468618, now seen corresponding path program 24 times [2024-06-04 16:17:04,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:04,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001695044] [2024-06-04 16:17:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:04,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:04,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:04,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001695044] [2024-06-04 16:17:04,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001695044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:04,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:04,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:04,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169415121] [2024-06-04 16:17:04,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:04,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:04,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:04,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:04,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:04,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:04,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 291 transitions, 3071 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:04,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:04,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:04,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:05,191 INFO L124 PetriNetUnfolderBase]: 2350/4106 cut-off events. [2024-06-04 16:17:05,191 INFO L125 PetriNetUnfolderBase]: For 448286/448286 co-relation queries the response was YES. [2024-06-04 16:17:05,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29048 conditions, 4106 events. 2350/4106 cut-off events. For 448286/448286 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27495 event pairs, 630 based on Foata normal form. 8/4111 useless extension candidates. Maximal degree in co-relation 28911. Up to 3625 conditions per place. [2024-06-04 16:17:05,236 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 278 selfloop transitions, 25 changer transitions 0/310 dead transitions. [2024-06-04 16:17:05,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 310 transitions, 3753 flow [2024-06-04 16:17:05,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-04 16:17:05,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-04 16:17:05,238 INFO L175 Difference]: Start difference. First operand has 283 places, 291 transitions, 3071 flow. Second operand 8 states and 175 transitions. [2024-06-04 16:17:05,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 310 transitions, 3753 flow [2024-06-04 16:17:07,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 310 transitions, 3656 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 16:17:07,060 INFO L231 Difference]: Finished difference. Result has 283 places, 291 transitions, 3029 flow [2024-06-04 16:17:07,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2974, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3029, PETRI_PLACES=283, PETRI_TRANSITIONS=291} [2024-06-04 16:17:07,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-04 16:17:07,061 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 291 transitions, 3029 flow [2024-06-04 16:17:07,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:07,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:07,061 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] [2024-06-04 16:17:07,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 16:17:07,061 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:07,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:07,062 INFO L85 PathProgramCache]: Analyzing trace with hash 392449302, now seen corresponding path program 25 times [2024-06-04 16:17:07,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:07,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657073332] [2024-06-04 16:17:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:07,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:07,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:07,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657073332] [2024-06-04 16:17:07,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657073332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:07,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:07,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:07,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440850539] [2024-06-04 16:17:07,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:07,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:07,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:07,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:07,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:07,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:07,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 291 transitions, 3029 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:07,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:07,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:07,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:08,133 INFO L124 PetriNetUnfolderBase]: 2332/4071 cut-off events. [2024-06-04 16:17:08,133 INFO L125 PetriNetUnfolderBase]: For 420220/420220 co-relation queries the response was YES. [2024-06-04 16:17:08,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27935 conditions, 4071 events. 2332/4071 cut-off events. For 420220/420220 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27202 event pairs, 611 based on Foata normal form. 8/4074 useless extension candidates. Maximal degree in co-relation 27798. Up to 3498 conditions per place. [2024-06-04 16:17:08,179 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 274 selfloop transitions, 44 changer transitions 0/325 dead transitions. [2024-06-04 16:17:08,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 325 transitions, 3781 flow [2024-06-04 16:17:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 16:17:08,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-04 16:17:08,180 INFO L175 Difference]: Start difference. First operand has 283 places, 291 transitions, 3029 flow. Second operand 8 states and 198 transitions. [2024-06-04 16:17:08,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 325 transitions, 3781 flow [2024-06-04 16:17:10,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 325 transitions, 3721 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:10,945 INFO L231 Difference]: Finished difference. Result has 284 places, 291 transitions, 3069 flow [2024-06-04 16:17:10,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3069, PETRI_PLACES=284, PETRI_TRANSITIONS=291} [2024-06-04 16:17:10,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-04 16:17:10,945 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 291 transitions, 3069 flow [2024-06-04 16:17:10,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:10,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:10,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:10,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 16:17:10,946 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:10,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:10,946 INFO L85 PathProgramCache]: Analyzing trace with hash -644963736, now seen corresponding path program 26 times [2024-06-04 16:17:10,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:10,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045845703] [2024-06-04 16:17:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:10,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:11,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:11,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045845703] [2024-06-04 16:17:11,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045845703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:11,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:11,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:11,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952180106] [2024-06-04 16:17:11,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:11,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:11,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:11,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:11,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:11,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:11,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 291 transitions, 3069 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:11,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:11,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:11,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:12,080 INFO L124 PetriNetUnfolderBase]: 2322/4057 cut-off events. [2024-06-04 16:17:12,081 INFO L125 PetriNetUnfolderBase]: For 392479/392479 co-relation queries the response was YES. [2024-06-04 16:17:12,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27259 conditions, 4057 events. 2322/4057 cut-off events. For 392479/392479 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 27110 event pairs, 603 based on Foata normal form. 8/4060 useless extension candidates. Maximal degree in co-relation 27121. Up to 3516 conditions per place. [2024-06-04 16:17:12,128 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 273 selfloop transitions, 43 changer transitions 0/323 dead transitions. [2024-06-04 16:17:12,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 323 transitions, 3829 flow [2024-06-04 16:17:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:17:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:17:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:17:12,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-04 16:17:12,129 INFO L175 Difference]: Start difference. First operand has 284 places, 291 transitions, 3069 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:17:12,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 323 transitions, 3829 flow [2024-06-04 16:17:13,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 323 transitions, 3731 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:17:13,935 INFO L231 Difference]: Finished difference. Result has 283 places, 293 transitions, 3092 flow [2024-06-04 16:17:13,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2971, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3092, PETRI_PLACES=283, PETRI_TRANSITIONS=293} [2024-06-04 16:17:13,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-04 16:17:13,936 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 293 transitions, 3092 flow [2024-06-04 16:17:13,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:13,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:13,936 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, 1] [2024-06-04 16:17:13,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 16:17:13,937 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:13,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1474896488, now seen corresponding path program 27 times [2024-06-04 16:17:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:13,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636395635] [2024-06-04 16:17:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:13,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:14,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:14,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636395635] [2024-06-04 16:17:14,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636395635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:14,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:14,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:14,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828183046] [2024-06-04 16:17:14,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:14,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:14,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:14,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:14,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:14,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:14,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 293 transitions, 3092 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:14,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:14,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:14,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:14,980 INFO L124 PetriNetUnfolderBase]: 2304/4040 cut-off events. [2024-06-04 16:17:14,980 INFO L125 PetriNetUnfolderBase]: For 356405/356405 co-relation queries the response was YES. [2024-06-04 16:17:15,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26330 conditions, 4040 events. 2304/4040 cut-off events. For 356405/356405 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 27058 event pairs, 428 based on Foata normal form. 8/4045 useless extension candidates. Maximal degree in co-relation 26192. Up to 3195 conditions per place. [2024-06-04 16:17:15,024 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 266 selfloop transitions, 58 changer transitions 0/331 dead transitions. [2024-06-04 16:17:15,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 331 transitions, 3896 flow [2024-06-04 16:17:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 16:17:15,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-04 16:17:15,025 INFO L175 Difference]: Start difference. First operand has 283 places, 293 transitions, 3092 flow. Second operand 8 states and 201 transitions. [2024-06-04 16:17:15,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 331 transitions, 3896 flow [2024-06-04 16:17:16,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 331 transitions, 3786 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:16,733 INFO L231 Difference]: Finished difference. Result has 285 places, 293 transitions, 3108 flow [2024-06-04 16:17:16,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3108, PETRI_PLACES=285, PETRI_TRANSITIONS=293} [2024-06-04 16:17:16,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-04 16:17:16,734 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 293 transitions, 3108 flow [2024-06-04 16:17:16,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:16,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:16,734 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, 1] [2024-06-04 16:17:16,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 16:17:16,734 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:16,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:16,735 INFO L85 PathProgramCache]: Analyzing trace with hash -251244342, now seen corresponding path program 2 times [2024-06-04 16:17:16,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:16,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26283608] [2024-06-04 16:17:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:16,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:17,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:17,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26283608] [2024-06-04 16:17:17,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26283608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:17,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:17,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:17,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742883529] [2024-06-04 16:17:17,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:17,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:17,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:17,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:17,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:17,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:17,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 293 transitions, 3108 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:17,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:17,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:17,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:17,719 INFO L124 PetriNetUnfolderBase]: 2324/4050 cut-off events. [2024-06-04 16:17:17,719 INFO L125 PetriNetUnfolderBase]: For 355261/355261 co-relation queries the response was YES. [2024-06-04 16:17:17,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26711 conditions, 4050 events. 2324/4050 cut-off events. For 355261/355261 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 27066 event pairs, 590 based on Foata normal form. 6/4049 useless extension candidates. Maximal degree in co-relation 26572. Up to 3404 conditions per place. [2024-06-04 16:17:17,762 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 270 selfloop transitions, 49 changer transitions 0/326 dead transitions. [2024-06-04 16:17:17,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 326 transitions, 3930 flow [2024-06-04 16:17:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:17:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:17:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:17:17,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-04 16:17:17,763 INFO L175 Difference]: Start difference. First operand has 285 places, 293 transitions, 3108 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:17:17,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 326 transitions, 3930 flow [2024-06-04 16:17:19,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 326 transitions, 3808 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:19,622 INFO L231 Difference]: Finished difference. Result has 286 places, 296 transitions, 3174 flow [2024-06-04 16:17:19,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3174, PETRI_PLACES=286, PETRI_TRANSITIONS=296} [2024-06-04 16:17:19,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-04 16:17:19,623 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 296 transitions, 3174 flow [2024-06-04 16:17:19,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:19,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:19,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:19,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 16:17:19,623 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:19,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:19,624 INFO L85 PathProgramCache]: Analyzing trace with hash 212117928, now seen corresponding path program 3 times [2024-06-04 16:17:19,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:19,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756681435] [2024-06-04 16:17:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:19,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:19,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:19,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756681435] [2024-06-04 16:17:19,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756681435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:19,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:19,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:19,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170108192] [2024-06-04 16:17:19,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:19,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:19,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:19,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:19,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:19,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:19,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 296 transitions, 3174 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:19,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:19,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:19,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:20,626 INFO L124 PetriNetUnfolderBase]: 2344/4113 cut-off events. [2024-06-04 16:17:20,626 INFO L125 PetriNetUnfolderBase]: For 356795/356795 co-relation queries the response was YES. [2024-06-04 16:17:20,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27009 conditions, 4113 events. 2344/4113 cut-off events. For 356795/356795 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27652 event pairs, 440 based on Foata normal form. 6/4116 useless extension candidates. Maximal degree in co-relation 26868. Up to 3122 conditions per place. [2024-06-04 16:17:20,668 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 265 selfloop transitions, 62 changer transitions 0/334 dead transitions. [2024-06-04 16:17:20,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 334 transitions, 4230 flow [2024-06-04 16:17:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:20,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:17:20,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-04 16:17:20,670 INFO L175 Difference]: Start difference. First operand has 286 places, 296 transitions, 3174 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:17:20,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 334 transitions, 4230 flow [2024-06-04 16:17:22,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 334 transitions, 4162 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 16:17:22,622 INFO L231 Difference]: Finished difference. Result has 292 places, 299 transitions, 3332 flow [2024-06-04 16:17:22,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3332, PETRI_PLACES=292, PETRI_TRANSITIONS=299} [2024-06-04 16:17:22,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-04 16:17:22,623 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 299 transitions, 3332 flow [2024-06-04 16:17:22,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:22,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:22,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:22,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 16:17:22,623 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:22,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash 205451688, now seen corresponding path program 4 times [2024-06-04 16:17:22,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:22,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625559753] [2024-06-04 16:17:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:22,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:22,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:22,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625559753] [2024-06-04 16:17:22,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625559753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:22,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:22,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:22,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744152522] [2024-06-04 16:17:22,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:22,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:22,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:22,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:22,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:22,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:22,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 299 transitions, 3332 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:22,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:22,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:22,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:23,636 INFO L124 PetriNetUnfolderBase]: 2331/4101 cut-off events. [2024-06-04 16:17:23,636 INFO L125 PetriNetUnfolderBase]: For 337255/337255 co-relation queries the response was YES. [2024-06-04 16:17:23,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26782 conditions, 4101 events. 2331/4101 cut-off events. For 337255/337255 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27619 event pairs, 407 based on Foata normal form. 6/4104 useless extension candidates. Maximal degree in co-relation 26638. Up to 3116 conditions per place. [2024-06-04 16:17:23,681 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 266 selfloop transitions, 64 changer transitions 0/337 dead transitions. [2024-06-04 16:17:23,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 337 transitions, 4164 flow [2024-06-04 16:17:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 16:17:23,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:17:23,682 INFO L175 Difference]: Start difference. First operand has 292 places, 299 transitions, 3332 flow. Second operand 8 states and 200 transitions. [2024-06-04 16:17:23,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 337 transitions, 4164 flow [2024-06-04 16:17:25,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 337 transitions, 4009 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 16:17:25,899 INFO L231 Difference]: Finished difference. Result has 295 places, 299 transitions, 3309 flow [2024-06-04 16:17:25,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3177, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3309, PETRI_PLACES=295, PETRI_TRANSITIONS=299} [2024-06-04 16:17:25,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-04 16:17:25,900 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 299 transitions, 3309 flow [2024-06-04 16:17:25,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:25,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:25,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:25,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 16:17:25,900 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:25,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:25,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1495797979, now seen corresponding path program 1 times [2024-06-04 16:17:25,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:25,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18817926] [2024-06-04 16:17:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:25,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:26,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:26,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18817926] [2024-06-04 16:17:26,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18817926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:26,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:26,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:26,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265580723] [2024-06-04 16:17:26,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:26,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:26,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:26,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:26,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:26,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 299 transitions, 3309 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:26,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:26,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:26,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:26,972 INFO L124 PetriNetUnfolderBase]: 2384/4166 cut-off events. [2024-06-04 16:17:26,973 INFO L125 PetriNetUnfolderBase]: For 373650/373650 co-relation queries the response was YES. [2024-06-04 16:17:27,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27856 conditions, 4166 events. 2384/4166 cut-off events. For 373650/373650 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 28009 event pairs, 560 based on Foata normal form. 6/4169 useless extension candidates. Maximal degree in co-relation 27712. Up to 3497 conditions per place. [2024-06-04 16:17:27,013 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 312 selfloop transitions, 20 changer transitions 0/339 dead transitions. [2024-06-04 16:17:27,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 339 transitions, 4357 flow [2024-06-04 16:17:27,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 16:17:27,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-04 16:17:27,014 INFO L175 Difference]: Start difference. First operand has 295 places, 299 transitions, 3309 flow. Second operand 8 states and 190 transitions. [2024-06-04 16:17:27,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 339 transitions, 4357 flow [2024-06-04 16:17:29,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 339 transitions, 4196 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:29,254 INFO L231 Difference]: Finished difference. Result has 296 places, 301 transitions, 3254 flow [2024-06-04 16:17:29,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3254, PETRI_PLACES=296, PETRI_TRANSITIONS=301} [2024-06-04 16:17:29,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-04 16:17:29,255 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 301 transitions, 3254 flow [2024-06-04 16:17:29,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:29,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:29,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:29,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 16:17:29,256 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:29,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2013726589, now seen corresponding path program 2 times [2024-06-04 16:17:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:29,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225167776] [2024-06-04 16:17:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:29,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:29,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:29,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225167776] [2024-06-04 16:17:29,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225167776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:29,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:29,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:29,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303185398] [2024-06-04 16:17:29,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:29,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:29,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:29,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:29,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:29,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:29,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 301 transitions, 3254 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:29,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:29,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:29,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:30,255 INFO L124 PetriNetUnfolderBase]: 2371/4155 cut-off events. [2024-06-04 16:17:30,255 INFO L125 PetriNetUnfolderBase]: For 350497/350497 co-relation queries the response was YES. [2024-06-04 16:17:30,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26830 conditions, 4155 events. 2371/4155 cut-off events. For 350497/350497 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27981 event pairs, 570 based on Foata normal form. 6/4158 useless extension candidates. Maximal degree in co-relation 26686. Up to 3616 conditions per place. [2024-06-04 16:17:30,301 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 308 selfloop transitions, 18 changer transitions 0/333 dead transitions. [2024-06-04 16:17:30,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 333 transitions, 4002 flow [2024-06-04 16:17:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 16:17:30,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:17:30,302 INFO L175 Difference]: Start difference. First operand has 296 places, 301 transitions, 3254 flow. Second operand 8 states and 184 transitions. [2024-06-04 16:17:30,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 333 transitions, 4002 flow [2024-06-04 16:17:32,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 333 transitions, 3943 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 16:17:32,848 INFO L231 Difference]: Finished difference. Result has 300 places, 301 transitions, 3235 flow [2024-06-04 16:17:32,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3195, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3235, PETRI_PLACES=300, PETRI_TRANSITIONS=301} [2024-06-04 16:17:32,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-04 16:17:32,848 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 301 transitions, 3235 flow [2024-06-04 16:17:32,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:32,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:32,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:32,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 16:17:32,849 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:32,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:32,850 INFO L85 PathProgramCache]: Analyzing trace with hash -662548261, now seen corresponding path program 3 times [2024-06-04 16:17:32,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:32,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811582527] [2024-06-04 16:17:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:32,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:33,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:33,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811582527] [2024-06-04 16:17:33,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811582527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:33,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:33,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:33,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397368518] [2024-06-04 16:17:33,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:33,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:33,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:33,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:33,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:33,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:33,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 301 transitions, 3235 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:33,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:33,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:33,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:33,940 INFO L124 PetriNetUnfolderBase]: 2445/4267 cut-off events. [2024-06-04 16:17:33,940 INFO L125 PetriNetUnfolderBase]: For 408542/408542 co-relation queries the response was YES. [2024-06-04 16:17:33,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28546 conditions, 4267 events. 2445/4267 cut-off events. For 408542/408542 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28852 event pairs, 648 based on Foata normal form. 8/4270 useless extension candidates. Maximal degree in co-relation 28400. Up to 3481 conditions per place. [2024-06-04 16:17:33,986 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 281 selfloop transitions, 59 changer transitions 0/347 dead transitions. [2024-06-04 16:17:33,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 347 transitions, 4357 flow [2024-06-04 16:17:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:33,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-04 16:17:33,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780487804878048 [2024-06-04 16:17:33,987 INFO L175 Difference]: Start difference. First operand has 300 places, 301 transitions, 3235 flow. Second operand 10 states and 237 transitions. [2024-06-04 16:17:33,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 347 transitions, 4357 flow [2024-06-04 16:17:35,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 347 transitions, 4309 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:35,859 INFO L231 Difference]: Finished difference. Result has 303 places, 303 transitions, 3375 flow [2024-06-04 16:17:35,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3187, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3375, PETRI_PLACES=303, PETRI_TRANSITIONS=303} [2024-06-04 16:17:35,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-04 16:17:35,860 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 303 transitions, 3375 flow [2024-06-04 16:17:35,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:35,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:35,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:35,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 16:17:35,861 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:35,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:35,861 INFO L85 PathProgramCache]: Analyzing trace with hash -654929701, now seen corresponding path program 4 times [2024-06-04 16:17:35,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:35,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567891641] [2024-06-04 16:17:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:35,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:36,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:36,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567891641] [2024-06-04 16:17:36,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567891641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:36,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:36,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:36,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790789083] [2024-06-04 16:17:36,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:36,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:36,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:36,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:36,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:36,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:36,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 303 transitions, 3375 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:36,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:36,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:36,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:36,909 INFO L124 PetriNetUnfolderBase]: 2473/4313 cut-off events. [2024-06-04 16:17:36,910 INFO L125 PetriNetUnfolderBase]: For 420158/420158 co-relation queries the response was YES. [2024-06-04 16:17:36,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29184 conditions, 4313 events. 2473/4313 cut-off events. For 420158/420158 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29199 event pairs, 670 based on Foata normal form. 8/4318 useless extension candidates. Maximal degree in co-relation 29037. Up to 3719 conditions per place. [2024-06-04 16:17:36,957 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 276 selfloop transitions, 57 changer transitions 0/340 dead transitions. [2024-06-04 16:17:36,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 340 transitions, 4199 flow [2024-06-04 16:17:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:36,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-04 16:17:36,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:17:36,958 INFO L175 Difference]: Start difference. First operand has 303 places, 303 transitions, 3375 flow. Second operand 10 states and 230 transitions. [2024-06-04 16:17:36,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 340 transitions, 4199 flow [2024-06-04 16:17:39,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 340 transitions, 4105 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:39,062 INFO L231 Difference]: Finished difference. Result has 307 places, 304 transitions, 3436 flow [2024-06-04 16:17:39,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3285, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3436, PETRI_PLACES=307, PETRI_TRANSITIONS=304} [2024-06-04 16:17:39,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-04 16:17:39,062 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 304 transitions, 3436 flow [2024-06-04 16:17:39,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:39,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:39,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:39,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 16:17:39,063 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:39,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:39,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1812849903, now seen corresponding path program 5 times [2024-06-04 16:17:39,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:39,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10415900] [2024-06-04 16:17:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:39,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:39,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:39,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10415900] [2024-06-04 16:17:39,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10415900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:39,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:39,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:39,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116113722] [2024-06-04 16:17:39,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:39,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:39,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:39,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:39,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:39,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:39,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 304 transitions, 3436 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:39,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:39,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:39,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:40,125 INFO L124 PetriNetUnfolderBase]: 2455/4287 cut-off events. [2024-06-04 16:17:40,125 INFO L125 PetriNetUnfolderBase]: For 384386/384386 co-relation queries the response was YES. [2024-06-04 16:17:40,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28165 conditions, 4287 events. 2455/4287 cut-off events. For 384386/384386 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29075 event pairs, 662 based on Foata normal form. 8/4292 useless extension candidates. Maximal degree in co-relation 28016. Up to 3693 conditions per place. [2024-06-04 16:17:40,173 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 274 selfloop transitions, 56 changer transitions 0/337 dead transitions. [2024-06-04 16:17:40,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 337 transitions, 4212 flow [2024-06-04 16:17:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:40,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-04 16:17:40,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-04 16:17:40,175 INFO L175 Difference]: Start difference. First operand has 307 places, 304 transitions, 3436 flow. Second operand 10 states and 228 transitions. [2024-06-04 16:17:40,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 337 transitions, 4212 flow [2024-06-04 16:17:42,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 337 transitions, 4067 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 16:17:42,178 INFO L231 Difference]: Finished difference. Result has 309 places, 304 transitions, 3408 flow [2024-06-04 16:17:42,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3291, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3408, PETRI_PLACES=309, PETRI_TRANSITIONS=304} [2024-06-04 16:17:42,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-04 16:17:42,178 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 304 transitions, 3408 flow [2024-06-04 16:17:42,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:42,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:42,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:42,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 16:17:42,179 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:42,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:42,179 INFO L85 PathProgramCache]: Analyzing trace with hash -257076397, now seen corresponding path program 1 times [2024-06-04 16:17:42,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:42,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263794338] [2024-06-04 16:17:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:42,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:42,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:42,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263794338] [2024-06-04 16:17:42,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263794338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:42,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:42,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:42,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387041661] [2024-06-04 16:17:42,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:42,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:42,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:42,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:42,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:42,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:42,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 304 transitions, 3408 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:42,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:42,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:42,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:43,345 INFO L124 PetriNetUnfolderBase]: 2508/4366 cut-off events. [2024-06-04 16:17:43,345 INFO L125 PetriNetUnfolderBase]: For 412191/412191 co-relation queries the response was YES. [2024-06-04 16:17:43,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29317 conditions, 4366 events. 2508/4366 cut-off events. For 412191/412191 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 29656 event pairs, 637 based on Foata normal form. 6/4361 useless extension candidates. Maximal degree in co-relation 29167. Up to 3358 conditions per place. [2024-06-04 16:17:43,385 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 277 selfloop transitions, 68 changer transitions 0/352 dead transitions. [2024-06-04 16:17:43,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 352 transitions, 4554 flow [2024-06-04 16:17:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-04 16:17:43,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-04 16:17:43,386 INFO L175 Difference]: Start difference. First operand has 309 places, 304 transitions, 3408 flow. Second operand 10 states and 239 transitions. [2024-06-04 16:17:43,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 352 transitions, 4554 flow [2024-06-04 16:17:45,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 352 transitions, 4429 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:17:45,607 INFO L231 Difference]: Finished difference. Result has 310 places, 306 transitions, 3493 flow [2024-06-04 16:17:45,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3493, PETRI_PLACES=310, PETRI_TRANSITIONS=306} [2024-06-04 16:17:45,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-04 16:17:45,608 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 306 transitions, 3493 flow [2024-06-04 16:17:45,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:45,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:45,608 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] [2024-06-04 16:17:45,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 16:17:45,609 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:45,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:45,609 INFO L85 PathProgramCache]: Analyzing trace with hash -256749967, now seen corresponding path program 2 times [2024-06-04 16:17:45,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:45,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408394816] [2024-06-04 16:17:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:45,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:45,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:45,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408394816] [2024-06-04 16:17:45,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408394816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:45,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:45,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68506816] [2024-06-04 16:17:45,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:45,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:45,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:45,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:45,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:45,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:45,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 306 transitions, 3493 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:45,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:45,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:45,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:46,704 INFO L124 PetriNetUnfolderBase]: 2528/4395 cut-off events. [2024-06-04 16:17:46,704 INFO L125 PetriNetUnfolderBase]: For 422098/422098 co-relation queries the response was YES. [2024-06-04 16:17:46,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29805 conditions, 4395 events. 2528/4395 cut-off events. For 422098/422098 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 29901 event pairs, 649 based on Foata normal form. 6/4390 useless extension candidates. Maximal degree in co-relation 29654. Up to 3370 conditions per place. [2024-06-04 16:17:46,752 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 276 selfloop transitions, 68 changer transitions 0/351 dead transitions. [2024-06-04 16:17:46,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 351 transitions, 4619 flow [2024-06-04 16:17:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-04 16:17:46,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780487804878048 [2024-06-04 16:17:46,753 INFO L175 Difference]: Start difference. First operand has 310 places, 306 transitions, 3493 flow. Second operand 10 states and 237 transitions. [2024-06-04 16:17:46,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 351 transitions, 4619 flow [2024-06-04 16:17:48,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 351 transitions, 4446 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:48,730 INFO L231 Difference]: Finished difference. Result has 313 places, 307 transitions, 3496 flow [2024-06-04 16:17:48,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3496, PETRI_PLACES=313, PETRI_TRANSITIONS=307} [2024-06-04 16:17:48,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-04 16:17:48,730 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 307 transitions, 3496 flow [2024-06-04 16:17:48,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:48,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:48,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:48,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 16:17:48,731 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:48,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1043593107, now seen corresponding path program 3 times [2024-06-04 16:17:48,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:48,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216219643] [2024-06-04 16:17:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:48,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:49,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:49,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216219643] [2024-06-04 16:17:49,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216219643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:49,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:49,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:49,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116768723] [2024-06-04 16:17:49,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:49,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:49,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:49,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:49,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:49,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:49,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 307 transitions, 3496 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:49,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:49,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:49,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:49,779 INFO L124 PetriNetUnfolderBase]: 2515/4389 cut-off events. [2024-06-04 16:17:49,779 INFO L125 PetriNetUnfolderBase]: For 393632/393632 co-relation queries the response was YES. [2024-06-04 16:17:49,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28886 conditions, 4389 events. 2515/4389 cut-off events. For 393632/393632 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 29878 event pairs, 680 based on Foata normal form. 6/4390 useless extension candidates. Maximal degree in co-relation 28734. Up to 3727 conditions per place. [2024-06-04 16:17:49,828 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 277 selfloop transitions, 59 changer transitions 0/343 dead transitions. [2024-06-04 16:17:49,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 343 transitions, 4308 flow [2024-06-04 16:17:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-04 16:17:49,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:17:49,830 INFO L175 Difference]: Start difference. First operand has 313 places, 307 transitions, 3496 flow. Second operand 10 states and 230 transitions. [2024-06-04 16:17:49,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 343 transitions, 4308 flow [2024-06-04 16:17:51,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 343 transitions, 4162 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:51,445 INFO L231 Difference]: Finished difference. Result has 316 places, 307 transitions, 3472 flow [2024-06-04 16:17:51,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3472, PETRI_PLACES=316, PETRI_TRANSITIONS=307} [2024-06-04 16:17:51,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-04 16:17:51,446 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 307 transitions, 3472 flow [2024-06-04 16:17:51,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:51,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:51,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:51,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 16:17:51,446 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:51,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1813048973, now seen corresponding path program 6 times [2024-06-04 16:17:51,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:51,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000814997] [2024-06-04 16:17:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:51,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:51,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:51,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000814997] [2024-06-04 16:17:51,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000814997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:51,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:51,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:51,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088646442] [2024-06-04 16:17:51,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:51,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:51,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:51,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:51,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:51,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:51,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 307 transitions, 3472 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:51,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:51,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:51,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:52,554 INFO L124 PetriNetUnfolderBase]: 2576/4474 cut-off events. [2024-06-04 16:17:52,554 INFO L125 PetriNetUnfolderBase]: For 446839/446839 co-relation queries the response was YES. [2024-06-04 16:17:52,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30174 conditions, 4474 events. 2576/4474 cut-off events. For 446839/446839 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 30616 event pairs, 715 based on Foata normal form. 8/4474 useless extension candidates. Maximal degree in co-relation 30021. Up to 3690 conditions per place. [2024-06-04 16:17:52,606 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 277 selfloop transitions, 58 changer transitions 0/342 dead transitions. [2024-06-04 16:17:52,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 342 transitions, 4572 flow [2024-06-04 16:17:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:17:52,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:17:52,607 INFO L175 Difference]: Start difference. First operand has 316 places, 307 transitions, 3472 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:17:52,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 342 transitions, 4572 flow [2024-06-04 16:17:55,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 342 transitions, 4424 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-04 16:17:55,292 INFO L231 Difference]: Finished difference. Result has 314 places, 309 transitions, 3514 flow [2024-06-04 16:17:55,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3514, PETRI_PLACES=314, PETRI_TRANSITIONS=309} [2024-06-04 16:17:55,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-04 16:17:55,293 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 309 transitions, 3514 flow [2024-06-04 16:17:55,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:55,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:55,293 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] [2024-06-04 16:17:55,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 16:17:55,294 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:55,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1551574899, now seen corresponding path program 7 times [2024-06-04 16:17:55,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:55,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751304950] [2024-06-04 16:17:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:55,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:55,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:55,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751304950] [2024-06-04 16:17:55,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751304950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:55,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:55,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:55,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118533938] [2024-06-04 16:17:55,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:55,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:55,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:55,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:55,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:55,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:55,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 309 transitions, 3514 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:55,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:55,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:55,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:56,370 INFO L124 PetriNetUnfolderBase]: 2604/4518 cut-off events. [2024-06-04 16:17:56,371 INFO L125 PetriNetUnfolderBase]: For 458756/458756 co-relation queries the response was YES. [2024-06-04 16:17:56,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30653 conditions, 4518 events. 2604/4518 cut-off events. For 458756/458756 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30980 event pairs, 735 based on Foata normal form. 8/4518 useless extension candidates. Maximal degree in co-relation 30499. Up to 3928 conditions per place. [2024-06-04 16:17:56,422 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 272 selfloop transitions, 56 changer transitions 0/335 dead transitions. [2024-06-04 16:17:56,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 335 transitions, 4302 flow [2024-06-04 16:17:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:17:56,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-04 16:17:56,423 INFO L175 Difference]: Start difference. First operand has 314 places, 309 transitions, 3514 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:17:56,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 335 transitions, 4302 flow [2024-06-04 16:17:58,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 335 transitions, 4204 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 16:17:58,476 INFO L231 Difference]: Finished difference. Result has 318 places, 310 transitions, 3571 flow [2024-06-04 16:17:58,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3422, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3571, PETRI_PLACES=318, PETRI_TRANSITIONS=310} [2024-06-04 16:17:58,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-04 16:17:58,477 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 310 transitions, 3571 flow [2024-06-04 16:17:58,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:58,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:58,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:58,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 16:17:58,477 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:58,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:58,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1865274129, now seen corresponding path program 8 times [2024-06-04 16:17:58,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:58,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685338905] [2024-06-04 16:17:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:58,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:58,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:58,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685338905] [2024-06-04 16:17:58,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685338905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:58,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:58,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:58,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041238875] [2024-06-04 16:17:58,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:58,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:58,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:58,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:58,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:58,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:17:58,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 310 transitions, 3571 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:58,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:58,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:17:58,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:59,577 INFO L124 PetriNetUnfolderBase]: 2632/4562 cut-off events. [2024-06-04 16:17:59,578 INFO L125 PetriNetUnfolderBase]: For 466066/466066 co-relation queries the response was YES. [2024-06-04 16:17:59,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31000 conditions, 4562 events. 2632/4562 cut-off events. For 466066/466066 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31299 event pairs, 739 based on Foata normal form. 8/4562 useless extension candidates. Maximal degree in co-relation 30844. Up to 3972 conditions per place. [2024-06-04 16:17:59,632 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 271 selfloop transitions, 55 changer transitions 0/333 dead transitions. [2024-06-04 16:17:59,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 333 transitions, 4343 flow [2024-06-04 16:17:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 16:17:59,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-04 16:17:59,633 INFO L175 Difference]: Start difference. First operand has 318 places, 310 transitions, 3571 flow. Second operand 8 states and 183 transitions. [2024-06-04 16:17:59,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 333 transitions, 4343 flow [2024-06-04 16:18:02,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 333 transitions, 4216 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 16:18:02,708 INFO L231 Difference]: Finished difference. Result has 320 places, 311 transitions, 3593 flow [2024-06-04 16:18:02,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3593, PETRI_PLACES=320, PETRI_TRANSITIONS=311} [2024-06-04 16:18:02,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-04 16:18:02,708 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 311 transitions, 3593 flow [2024-06-04 16:18:02,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:02,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:02,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:02,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 16:18:02,709 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:02,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:02,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1314114799, now seen corresponding path program 9 times [2024-06-04 16:18:02,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:02,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502857307] [2024-06-04 16:18:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:02,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:03,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:03,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502857307] [2024-06-04 16:18:03,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502857307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:03,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:03,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:18:03,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477597245] [2024-06-04 16:18:03,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:03,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:18:03,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:18:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:18:03,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:03,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 311 transitions, 3593 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:03,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:03,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:03,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:03,807 INFO L124 PetriNetUnfolderBase]: 2614/4536 cut-off events. [2024-06-04 16:18:03,807 INFO L125 PetriNetUnfolderBase]: For 425620/425620 co-relation queries the response was YES. [2024-06-04 16:18:03,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29872 conditions, 4536 events. 2614/4536 cut-off events. For 425620/425620 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31125 event pairs, 731 based on Foata normal form. 8/4536 useless extension candidates. Maximal degree in co-relation 29715. Up to 3946 conditions per place. [2024-06-04 16:18:03,859 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 266 selfloop transitions, 57 changer transitions 0/330 dead transitions. [2024-06-04 16:18:03,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 330 transitions, 4319 flow [2024-06-04 16:18:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 16:18:03,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-04 16:18:03,861 INFO L175 Difference]: Start difference. First operand has 320 places, 311 transitions, 3593 flow. Second operand 8 states and 179 transitions. [2024-06-04 16:18:03,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 330 transitions, 4319 flow [2024-06-04 16:18:06,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 330 transitions, 4176 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 16:18:06,800 INFO L231 Difference]: Finished difference. Result has 322 places, 311 transitions, 3569 flow [2024-06-04 16:18:06,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3569, PETRI_PLACES=322, PETRI_TRANSITIONS=311} [2024-06-04 16:18:06,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-04 16:18:06,800 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 311 transitions, 3569 flow [2024-06-04 16:18:06,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:06,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:06,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:06,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 16:18:06,801 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:06,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:06,801 INFO L85 PathProgramCache]: Analyzing trace with hash 303006931, now seen corresponding path program 4 times [2024-06-04 16:18:06,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:06,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633330682] [2024-06-04 16:18:06,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:06,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:07,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:07,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633330682] [2024-06-04 16:18:07,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633330682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:07,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:07,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:18:07,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078619553] [2024-06-04 16:18:07,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:07,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:18:07,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:07,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:18:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:18:07,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:07,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 311 transitions, 3569 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:07,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:07,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:07,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:07,899 INFO L124 PetriNetUnfolderBase]: 2667/4615 cut-off events. [2024-06-04 16:18:07,899 INFO L125 PetriNetUnfolderBase]: For 456197/456197 co-relation queries the response was YES. [2024-06-04 16:18:07,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31084 conditions, 4615 events. 2667/4615 cut-off events. For 456197/456197 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 31697 event pairs, 706 based on Foata normal form. 6/4605 useless extension candidates. Maximal degree in co-relation 30926. Up to 3583 conditions per place. [2024-06-04 16:18:07,954 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 273 selfloop transitions, 68 changer transitions 0/348 dead transitions. [2024-06-04 16:18:07,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 348 transitions, 4697 flow [2024-06-04 16:18:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:18:07,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:18:07,955 INFO L175 Difference]: Start difference. First operand has 322 places, 311 transitions, 3569 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:18:07,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 348 transitions, 4697 flow [2024-06-04 16:18:10,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 348 transitions, 4567 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:10,797 INFO L231 Difference]: Finished difference. Result has 323 places, 313 transitions, 3653 flow [2024-06-04 16:18:10,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3439, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3653, PETRI_PLACES=323, PETRI_TRANSITIONS=313} [2024-06-04 16:18:10,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-04 16:18:10,797 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 313 transitions, 3653 flow [2024-06-04 16:18:10,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:10,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:10,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:10,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 16:18:10,798 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:10,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:10,798 INFO L85 PathProgramCache]: Analyzing trace with hash -494388715, now seen corresponding path program 5 times [2024-06-04 16:18:10,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:10,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616602270] [2024-06-04 16:18:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:10,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:11,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:11,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616602270] [2024-06-04 16:18:11,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616602270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:11,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:11,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:18:11,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022340263] [2024-06-04 16:18:11,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:11,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:18:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:18:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:18:11,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:11,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 313 transitions, 3653 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:11,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:11,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:11,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:11,961 INFO L124 PetriNetUnfolderBase]: 2687/4644 cut-off events. [2024-06-04 16:18:11,961 INFO L125 PetriNetUnfolderBase]: For 466393/466393 co-relation queries the response was YES. [2024-06-04 16:18:11,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31577 conditions, 4644 events. 2687/4644 cut-off events. For 466393/466393 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31907 event pairs, 718 based on Foata normal form. 6/4634 useless extension candidates. Maximal degree in co-relation 31418. Up to 3595 conditions per place. [2024-06-04 16:18:12,013 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 272 selfloop transitions, 68 changer transitions 0/347 dead transitions. [2024-06-04 16:18:12,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 347 transitions, 4759 flow [2024-06-04 16:18:12,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:18:12,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:18:12,015 INFO L175 Difference]: Start difference. First operand has 323 places, 313 transitions, 3653 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:18:12,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 347 transitions, 4759 flow [2024-06-04 16:18:15,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 347 transitions, 4580 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 16:18:15,180 INFO L231 Difference]: Finished difference. Result has 326 places, 314 transitions, 3652 flow [2024-06-04 16:18:15,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3652, PETRI_PLACES=326, PETRI_TRANSITIONS=314} [2024-06-04 16:18:15,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-04 16:18:15,180 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 314 transitions, 3652 flow [2024-06-04 16:18:15,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:15,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:15,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:15,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 16:18:15,181 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:15,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:15,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1475194131, now seen corresponding path program 6 times [2024-06-04 16:18:15,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:15,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989122351] [2024-06-04 16:18:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:15,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:15,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:15,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989122351] [2024-06-04 16:18:15,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989122351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:15,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:15,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:18:15,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571656913] [2024-06-04 16:18:15,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:15,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:18:15,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:15,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:18:15,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:18:15,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:15,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 314 transitions, 3652 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:15,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:15,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:15,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:16,340 INFO L124 PetriNetUnfolderBase]: 2707/4693 cut-off events. [2024-06-04 16:18:16,340 INFO L125 PetriNetUnfolderBase]: For 471638/471638 co-relation queries the response was YES. [2024-06-04 16:18:16,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31644 conditions, 4693 events. 2707/4693 cut-off events. For 471638/471638 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 32384 event pairs, 762 based on Foata normal form. 6/4689 useless extension candidates. Maximal degree in co-relation 31484. Up to 4031 conditions per place. [2024-06-04 16:18:16,396 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 275 selfloop transitions, 58 changer transitions 0/340 dead transitions. [2024-06-04 16:18:16,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 340 transitions, 4458 flow [2024-06-04 16:18:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:16,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:18:16,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-04 16:18:16,397 INFO L175 Difference]: Start difference. First operand has 326 places, 314 transitions, 3652 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:18:16,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 340 transitions, 4458 flow [2024-06-04 16:18:18,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 340 transitions, 4328 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:18:18,602 INFO L231 Difference]: Finished difference. Result has 329 places, 315 transitions, 3672 flow [2024-06-04 16:18:18,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3672, PETRI_PLACES=329, PETRI_TRANSITIONS=315} [2024-06-04 16:18:18,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-04 16:18:18,603 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 315 transitions, 3672 flow [2024-06-04 16:18:18,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:18,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:18,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:18,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 16:18:18,604 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:18,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:18,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1200324131, now seen corresponding path program 7 times [2024-06-04 16:18:18,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:18,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066025612] [2024-06-04 16:18:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:18,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:18,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:18,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066025612] [2024-06-04 16:18:18,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066025612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:18,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:18,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:18:18,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401127891] [2024-06-04 16:18:18,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:18,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:18:18,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:18,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:18:18,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:18:18,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:18,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 315 transitions, 3672 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:18,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:18,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:18,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:19,739 INFO L124 PetriNetUnfolderBase]: 2727/4745 cut-off events. [2024-06-04 16:18:19,740 INFO L125 PetriNetUnfolderBase]: For 479189/479189 co-relation queries the response was YES. [2024-06-04 16:18:19,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31854 conditions, 4745 events. 2727/4745 cut-off events. For 479189/479189 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 32647 event pairs, 608 based on Foata normal form. 6/4743 useless extension candidates. Maximal degree in co-relation 31693. Up to 2919 conditions per place. [2024-06-04 16:18:19,793 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 253 selfloop transitions, 93 changer transitions 0/353 dead transitions. [2024-06-04 16:18:19,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 353 transitions, 5010 flow [2024-06-04 16:18:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:18:19,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-04 16:18:19,795 INFO L175 Difference]: Start difference. First operand has 329 places, 315 transitions, 3672 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:18:19,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 353 transitions, 5010 flow [2024-06-04 16:18:22,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 353 transitions, 4878 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 16:18:22,436 INFO L231 Difference]: Finished difference. Result has 331 places, 316 transitions, 3766 flow [2024-06-04 16:18:22,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3766, PETRI_PLACES=331, PETRI_TRANSITIONS=316} [2024-06-04 16:18:22,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-04 16:18:22,436 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 316 transitions, 3766 flow [2024-06-04 16:18:22,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:22,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:22,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:22,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 16:18:22,437 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:22,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:22,437 INFO L85 PathProgramCache]: Analyzing trace with hash 75472083, now seen corresponding path program 8 times [2024-06-04 16:18:22,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:22,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041031578] [2024-06-04 16:18:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:22,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:22,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041031578] [2024-06-04 16:18:22,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041031578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:22,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:22,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:18:22,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487101830] [2024-06-04 16:18:22,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:22,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:18:22,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:22,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:18:22,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:18:22,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:22,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 316 transitions, 3766 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:22,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:22,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:22,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:23,561 INFO L124 PetriNetUnfolderBase]: 2747/4781 cut-off events. [2024-06-04 16:18:23,561 INFO L125 PetriNetUnfolderBase]: For 489793/489793 co-relation queries the response was YES. [2024-06-04 16:18:23,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32502 conditions, 4781 events. 2747/4781 cut-off events. For 489793/489793 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 32961 event pairs, 608 based on Foata normal form. 6/4779 useless extension candidates. Maximal degree in co-relation 32340. Up to 2931 conditions per place. [2024-06-04 16:18:23,619 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 254 selfloop transitions, 92 changer transitions 0/353 dead transitions. [2024-06-04 16:18:23,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 353 transitions, 5124 flow [2024-06-04 16:18:23,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:18:23,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:18:23,621 INFO L175 Difference]: Start difference. First operand has 331 places, 316 transitions, 3766 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:18:23,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 353 transitions, 5124 flow [2024-06-04 16:18:26,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 353 transitions, 4784 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-04 16:18:26,942 INFO L231 Difference]: Finished difference. Result has 331 places, 317 transitions, 3652 flow [2024-06-04 16:18:26,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3439, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3652, PETRI_PLACES=331, PETRI_TRANSITIONS=317} [2024-06-04 16:18:26,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-04 16:18:26,942 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 317 transitions, 3652 flow [2024-06-04 16:18:26,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:26,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:26,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:26,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 16:18:26,943 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:26,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:26,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1281568369, now seen corresponding path program 9 times [2024-06-04 16:18:26,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:26,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813800172] [2024-06-04 16:18:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:26,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:27,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:27,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813800172] [2024-06-04 16:18:27,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813800172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:27,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:27,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:18:27,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787187604] [2024-06-04 16:18:27,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:27,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:18:27,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:27,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:18:27,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:18:27,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:27,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 317 transitions, 3652 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:27,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:27,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:27,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:28,047 INFO L124 PetriNetUnfolderBase]: 2767/4803 cut-off events. [2024-06-04 16:18:28,048 INFO L125 PetriNetUnfolderBase]: For 495623/495623 co-relation queries the response was YES. [2024-06-04 16:18:28,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31922 conditions, 4803 events. 2767/4803 cut-off events. For 495623/495623 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 33094 event pairs, 569 based on Foata normal form. 6/4801 useless extension candidates. Maximal degree in co-relation 31762. Up to 2943 conditions per place. [2024-06-04 16:18:28,105 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 244 selfloop transitions, 98 changer transitions 0/349 dead transitions. [2024-06-04 16:18:28,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 349 transitions, 4753 flow [2024-06-04 16:18:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:18:28,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-04 16:18:28,106 INFO L175 Difference]: Start difference. First operand has 331 places, 317 transitions, 3652 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:18:28,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 349 transitions, 4753 flow [2024-06-04 16:18:31,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 349 transitions, 4558 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 16:18:31,486 INFO L231 Difference]: Finished difference. Result has 334 places, 318 transitions, 3684 flow [2024-06-04 16:18:31,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3684, PETRI_PLACES=334, PETRI_TRANSITIONS=318} [2024-06-04 16:18:31,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-04 16:18:31,486 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 318 transitions, 3684 flow [2024-06-04 16:18:31,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:31,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:31,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:31,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 16:18:31,487 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:31,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1298099765, now seen corresponding path program 10 times [2024-06-04 16:18:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:31,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589509807] [2024-06-04 16:18:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:31,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:31,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:31,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589509807] [2024-06-04 16:18:31,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589509807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:31,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:31,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:18:31,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130649376] [2024-06-04 16:18:31,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:31,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:18:31,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:31,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:18:31,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:18:31,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:31,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 318 transitions, 3684 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:31,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:31,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:31,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:32,704 INFO L124 PetriNetUnfolderBase]: 2754/4782 cut-off events. [2024-06-04 16:18:32,704 INFO L125 PetriNetUnfolderBase]: For 465257/465257 co-relation queries the response was YES. [2024-06-04 16:18:32,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31127 conditions, 4782 events. 2754/4782 cut-off events. For 465257/465257 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 33229 event pairs, 773 based on Foata normal form. 6/4778 useless extension candidates. Maximal degree in co-relation 30966. Up to 4140 conditions per place. [2024-06-04 16:18:32,767 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 274 selfloop transitions, 59 changer transitions 0/340 dead transitions. [2024-06-04 16:18:32,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 340 transitions, 4454 flow [2024-06-04 16:18:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:18:32,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-04 16:18:32,769 INFO L175 Difference]: Start difference. First operand has 334 places, 318 transitions, 3684 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:18:32,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 340 transitions, 4454 flow [2024-06-04 16:18:35,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 340 transitions, 4283 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 16:18:35,915 INFO L231 Difference]: Finished difference. Result has 337 places, 318 transitions, 3635 flow [2024-06-04 16:18:35,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3513, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3635, PETRI_PLACES=337, PETRI_TRANSITIONS=318} [2024-06-04 16:18:35,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-04 16:18:35,916 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 318 transitions, 3635 flow [2024-06-04 16:18:35,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:35,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:35,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:35,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 16:18:35,917 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:35,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1660762511, now seen corresponding path program 11 times [2024-06-04 16:18:35,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:35,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137365522] [2024-06-04 16:18:35,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:35,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:36,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:36,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137365522] [2024-06-04 16:18:36,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137365522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:36,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:36,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:18:36,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008085467] [2024-06-04 16:18:36,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:36,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:18:36,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:36,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:18:36,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:18:36,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:36,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 318 transitions, 3635 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:36,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:36,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:36,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:37,014 INFO L124 PetriNetUnfolderBase]: 2741/4755 cut-off events. [2024-06-04 16:18:37,014 INFO L125 PetriNetUnfolderBase]: For 430525/430525 co-relation queries the response was YES. [2024-06-04 16:18:37,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29827 conditions, 4755 events. 2741/4755 cut-off events. For 430525/430525 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 33011 event pairs, 756 based on Foata normal form. 6/4743 useless extension candidates. Maximal degree in co-relation 29665. Up to 3895 conditions per place. [2024-06-04 16:18:37,071 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 70 changer transitions 0/341 dead transitions. [2024-06-04 16:18:37,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 341 transitions, 4409 flow [2024-06-04 16:18:37,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:18:37,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-04 16:18:37,073 INFO L175 Difference]: Start difference. First operand has 337 places, 318 transitions, 3635 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:18:37,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 341 transitions, 4409 flow [2024-06-04 16:18:40,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 341 transitions, 4240 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 16:18:40,815 INFO L231 Difference]: Finished difference. Result has 337 places, 318 transitions, 3610 flow [2024-06-04 16:18:40,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3610, PETRI_PLACES=337, PETRI_TRANSITIONS=318} [2024-06-04 16:18:40,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-04 16:18:40,815 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 318 transitions, 3610 flow [2024-06-04 16:18:40,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:40,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:40,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:40,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 16:18:40,816 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:40,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:40,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1201794283, now seen corresponding path program 1 times [2024-06-04 16:18:40,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:40,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642169494] [2024-06-04 16:18:40,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:40,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:41,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:41,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642169494] [2024-06-04 16:18:41,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642169494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:41,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:41,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:41,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524967569] [2024-06-04 16:18:41,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:41,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:41,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:41,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:41,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:41,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:41,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 318 transitions, 3610 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:41,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:41,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:41,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:42,219 INFO L124 PetriNetUnfolderBase]: 2923/5111 cut-off events. [2024-06-04 16:18:42,219 INFO L125 PetriNetUnfolderBase]: For 684047/684047 co-relation queries the response was YES. [2024-06-04 16:18:42,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34081 conditions, 5111 events. 2923/5111 cut-off events. For 684047/684047 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35823 event pairs, 703 based on Foata normal form. 18/5126 useless extension candidates. Maximal degree in co-relation 33918. Up to 3853 conditions per place. [2024-06-04 16:18:42,268 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 327 selfloop transitions, 28 changer transitions 7/369 dead transitions. [2024-06-04 16:18:42,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 369 transitions, 5062 flow [2024-06-04 16:18:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:18:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:18:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:18:42,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 16:18:42,269 INFO L175 Difference]: Start difference. First operand has 337 places, 318 transitions, 3610 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:18:42,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 369 transitions, 5062 flow [2024-06-04 16:18:45,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 369 transitions, 4839 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 16:18:45,878 INFO L231 Difference]: Finished difference. Result has 338 places, 318 transitions, 3462 flow [2024-06-04 16:18:45,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3462, PETRI_PLACES=338, PETRI_TRANSITIONS=318} [2024-06-04 16:18:45,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-04 16:18:45,878 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 318 transitions, 3462 flow [2024-06-04 16:18:45,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:45,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:45,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:45,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 16:18:45,879 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:45,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1978588621, now seen corresponding path program 2 times [2024-06-04 16:18:45,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:45,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152099533] [2024-06-04 16:18:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:45,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:46,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:46,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152099533] [2024-06-04 16:18:46,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152099533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:46,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:46,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:46,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3013142] [2024-06-04 16:18:46,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:46,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:46,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:46,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:46,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:46,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 318 transitions, 3462 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:46,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:46,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:46,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:47,158 INFO L124 PetriNetUnfolderBase]: 2911/5089 cut-off events. [2024-06-04 16:18:47,158 INFO L125 PetriNetUnfolderBase]: For 681860/681860 co-relation queries the response was YES. [2024-06-04 16:18:47,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33753 conditions, 5089 events. 2911/5089 cut-off events. For 681860/681860 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35693 event pairs, 790 based on Foata normal form. 18/5104 useless extension candidates. Maximal degree in co-relation 33588. Up to 3853 conditions per place. [2024-06-04 16:18:47,222 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 316 selfloop transitions, 23 changer transitions 15/361 dead transitions. [2024-06-04 16:18:47,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 361 transitions, 4602 flow [2024-06-04 16:18:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:18:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:18:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-04 16:18:47,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-04 16:18:47,223 INFO L175 Difference]: Start difference. First operand has 338 places, 318 transitions, 3462 flow. Second operand 9 states and 214 transitions. [2024-06-04 16:18:47,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 361 transitions, 4602 flow [2024-06-04 16:18:51,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 361 transitions, 4551 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:51,102 INFO L231 Difference]: Finished difference. Result has 339 places, 313 transitions, 3399 flow [2024-06-04 16:18:51,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3399, PETRI_PLACES=339, PETRI_TRANSITIONS=313} [2024-06-04 16:18:51,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-04 16:18:51,103 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 313 transitions, 3399 flow [2024-06-04 16:18:51,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:51,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:51,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:51,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 16:18:51,103 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:51,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1646468369, now seen corresponding path program 3 times [2024-06-04 16:18:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:51,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342893584] [2024-06-04 16:18:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:51,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:51,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:51,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342893584] [2024-06-04 16:18:51,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342893584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:51,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:51,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:51,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109531355] [2024-06-04 16:18:51,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:51,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:51,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:51,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:51,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:51,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:51,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 313 transitions, 3399 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:51,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:51,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:51,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:52,434 INFO L124 PetriNetUnfolderBase]: 2963/5199 cut-off events. [2024-06-04 16:18:52,434 INFO L125 PetriNetUnfolderBase]: For 806021/806021 co-relation queries the response was YES. [2024-06-04 16:18:52,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36189 conditions, 5199 events. 2963/5199 cut-off events. For 806021/806021 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 36689 event pairs, 744 based on Foata normal form. 18/5214 useless extension candidates. Maximal degree in co-relation 36024. Up to 3729 conditions per place. [2024-06-04 16:18:52,501 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 320 selfloop transitions, 24 changer transitions 16/367 dead transitions. [2024-06-04 16:18:52,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 367 transitions, 4865 flow [2024-06-04 16:18:52,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:18:52,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:18:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-04 16:18:52,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:18:52,502 INFO L175 Difference]: Start difference. First operand has 339 places, 313 transitions, 3399 flow. Second operand 10 states and 240 transitions. [2024-06-04 16:18:52,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 367 transitions, 4865 flow [2024-06-04 16:18:58,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 367 transitions, 4787 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-04 16:18:58,903 INFO L231 Difference]: Finished difference. Result has 338 places, 310 transitions, 3343 flow [2024-06-04 16:18:58,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3325, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3343, PETRI_PLACES=338, PETRI_TRANSITIONS=310} [2024-06-04 16:18:58,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-04 16:18:58,904 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 310 transitions, 3343 flow [2024-06-04 16:18:58,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:58,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:58,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:58,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 16:18:58,905 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:58,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1311675285, now seen corresponding path program 4 times [2024-06-04 16:18:58,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:58,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755521787] [2024-06-04 16:18:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:58,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:59,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:59,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755521787] [2024-06-04 16:18:59,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755521787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:59,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:59,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:59,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797057785] [2024-06-04 16:18:59,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:59,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:59,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:59,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:18:59,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 310 transitions, 3343 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:59,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:59,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:18:59,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:00,145 INFO L124 PetriNetUnfolderBase]: 2880/5040 cut-off events. [2024-06-04 16:19:00,146 INFO L125 PetriNetUnfolderBase]: For 806474/806474 co-relation queries the response was YES. [2024-06-04 16:19:00,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35506 conditions, 5040 events. 2880/5040 cut-off events. For 806474/806474 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 35219 event pairs, 773 based on Foata normal form. 18/5055 useless extension candidates. Maximal degree in co-relation 35342. Up to 4145 conditions per place. [2024-06-04 16:19:00,208 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 321 selfloop transitions, 22 changer transitions 12/362 dead transitions. [2024-06-04 16:19:00,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 362 transitions, 4535 flow [2024-06-04 16:19:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:19:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:19:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-04 16:19:00,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521064301552107 [2024-06-04 16:19:00,210 INFO L175 Difference]: Start difference. First operand has 338 places, 310 transitions, 3343 flow. Second operand 11 states and 249 transitions. [2024-06-04 16:19:00,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 362 transitions, 4535 flow [2024-06-04 16:19:04,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 362 transitions, 4476 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 16:19:04,542 INFO L231 Difference]: Finished difference. Result has 336 places, 308 transitions, 3317 flow [2024-06-04 16:19:04,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3317, PETRI_PLACES=336, PETRI_TRANSITIONS=308} [2024-06-04 16:19:04,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-04 16:19:04,543 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 308 transitions, 3317 flow [2024-06-04 16:19:04,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:04,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:04,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:04,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 16:19:04,544 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:04,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:04,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1650187439, now seen corresponding path program 5 times [2024-06-04 16:19:04,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:04,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742730814] [2024-06-04 16:19:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:04,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:04,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:04,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742730814] [2024-06-04 16:19:04,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742730814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:04,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:04,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:04,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602190035] [2024-06-04 16:19:04,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:04,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:04,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:04,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:04,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:04,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:19:04,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 308 transitions, 3317 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:04,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:04,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:19:04,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:05,777 INFO L124 PetriNetUnfolderBase]: 2775/4853 cut-off events. [2024-06-04 16:19:05,777 INFO L125 PetriNetUnfolderBase]: For 659844/659844 co-relation queries the response was YES. [2024-06-04 16:19:05,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32518 conditions, 4853 events. 2775/4853 cut-off events. For 659844/659844 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33659 event pairs, 761 based on Foata normal form. 18/4868 useless extension candidates. Maximal degree in co-relation 32356. Up to 4145 conditions per place. [2024-06-04 16:19:05,830 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 296 selfloop transitions, 17 changer transitions 29/349 dead transitions. [2024-06-04 16:19:05,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 349 transitions, 4179 flow [2024-06-04 16:19:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:19:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:19:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 16:19:05,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-04 16:19:05,831 INFO L175 Difference]: Start difference. First operand has 336 places, 308 transitions, 3317 flow. Second operand 9 states and 208 transitions. [2024-06-04 16:19:05,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 349 transitions, 4179 flow [2024-06-04 16:19:09,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 349 transitions, 4124 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 16:19:09,421 INFO L231 Difference]: Finished difference. Result has 332 places, 303 transitions, 3237 flow [2024-06-04 16:19:09,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3262, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3237, PETRI_PLACES=332, PETRI_TRANSITIONS=303} [2024-06-04 16:19:09,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-04 16:19:09,421 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 303 transitions, 3237 flow [2024-06-04 16:19:09,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:09,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:09,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:09,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 16:19:09,422 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:09,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:09,422 INFO L85 PathProgramCache]: Analyzing trace with hash 753863047, now seen corresponding path program 6 times [2024-06-04 16:19:09,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:09,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717218476] [2024-06-04 16:19:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:09,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:09,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:09,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717218476] [2024-06-04 16:19:09,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717218476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:09,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:09,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:09,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029896519] [2024-06-04 16:19:09,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:09,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:09,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:09,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:19:09,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 303 transitions, 3237 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:09,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:09,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:19:09,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:10,627 INFO L124 PetriNetUnfolderBase]: 2870/4990 cut-off events. [2024-06-04 16:19:10,627 INFO L125 PetriNetUnfolderBase]: For 860684/860684 co-relation queries the response was YES. [2024-06-04 16:19:10,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36047 conditions, 4990 events. 2870/4990 cut-off events. For 860684/860684 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34901 event pairs, 812 based on Foata normal form. 24/5004 useless extension candidates. Maximal degree in co-relation 35886. Up to 3888 conditions per place. [2024-06-04 16:19:10,684 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 251 selfloop transitions, 80 changer transitions 10/348 dead transitions. [2024-06-04 16:19:10,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 348 transitions, 4355 flow [2024-06-04 16:19:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-04 16:19:10,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-04 16:19:10,685 INFO L175 Difference]: Start difference. First operand has 332 places, 303 transitions, 3237 flow. Second operand 10 states and 244 transitions. [2024-06-04 16:19:10,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 348 transitions, 4355 flow [2024-06-04 16:19:17,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 348 transitions, 4303 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 16:19:17,707 INFO L231 Difference]: Finished difference. Result has 325 places, 300 transitions, 3321 flow [2024-06-04 16:19:17,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3189, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3321, PETRI_PLACES=325, PETRI_TRANSITIONS=300} [2024-06-04 16:19:17,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-04 16:19:17,707 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 300 transitions, 3321 flow [2024-06-04 16:19:17,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:17,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:17,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:17,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 16:19:17,708 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:17,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash 79369333, now seen corresponding path program 1 times [2024-06-04 16:19:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:17,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725261689] [2024-06-04 16:19:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:17,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:17,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:17,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725261689] [2024-06-04 16:19:17,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725261689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:17,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:17,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:17,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037381546] [2024-06-04 16:19:17,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:17,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:17,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:17,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:17,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:18,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:19:18,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 300 transitions, 3321 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:18,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:18,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:19:18,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:18,862 INFO L124 PetriNetUnfolderBase]: 2858/4966 cut-off events. [2024-06-04 16:19:18,862 INFO L125 PetriNetUnfolderBase]: For 861141/861141 co-relation queries the response was YES. [2024-06-04 16:19:18,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36057 conditions, 4966 events. 2858/4966 cut-off events. For 861141/861141 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34697 event pairs, 909 based on Foata normal form. 26/4982 useless extension candidates. Maximal degree in co-relation 35899. Up to 4235 conditions per place. [2024-06-04 16:19:18,918 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 239 selfloop transitions, 75 changer transitions 14/335 dead transitions. [2024-06-04 16:19:18,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 335 transitions, 4111 flow [2024-06-04 16:19:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-04 16:19:18,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 16:19:18,920 INFO L175 Difference]: Start difference. First operand has 325 places, 300 transitions, 3321 flow. Second operand 10 states and 235 transitions. [2024-06-04 16:19:18,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 335 transitions, 4111 flow [2024-06-04 16:19:25,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 335 transitions, 3949 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-04 16:19:25,734 INFO L231 Difference]: Finished difference. Result has 325 places, 294 transitions, 3260 flow [2024-06-04 16:19:25,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3260, PETRI_PLACES=325, PETRI_TRANSITIONS=294} [2024-06-04 16:19:25,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-04 16:19:25,734 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 294 transitions, 3260 flow [2024-06-04 16:19:25,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:25,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:25,734 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, 1, 1, 1] [2024-06-04 16:19:25,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 16:19:25,735 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:25,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1445587397, now seen corresponding path program 2 times [2024-06-04 16:19:25,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:25,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445821630] [2024-06-04 16:19:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:25,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:26,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:26,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445821630] [2024-06-04 16:19:26,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445821630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:26,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:26,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:19:26,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132342011] [2024-06-04 16:19:26,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:26,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:19:26,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:26,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:19:26,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:19:26,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:19:26,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 294 transitions, 3260 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:26,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:26,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:19:26,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:26,922 INFO L124 PetriNetUnfolderBase]: 2840/4968 cut-off events. [2024-06-04 16:19:26,922 INFO L125 PetriNetUnfolderBase]: For 845811/845811 co-relation queries the response was YES. [2024-06-04 16:19:26,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35883 conditions, 4968 events. 2840/4968 cut-off events. For 845811/845811 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34956 event pairs, 869 based on Foata normal form. 24/4982 useless extension candidates. Maximal degree in co-relation 35725. Up to 3645 conditions per place. [2024-06-04 16:19:26,979 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 195 selfloop transitions, 123 changer transitions 19/344 dead transitions. [2024-06-04 16:19:26,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 344 transitions, 4414 flow [2024-06-04 16:19:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:19:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:19:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-04 16:19:26,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:19:26,980 INFO L175 Difference]: Start difference. First operand has 325 places, 294 transitions, 3260 flow. Second operand 11 states and 264 transitions. [2024-06-04 16:19:26,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 344 transitions, 4414 flow [2024-06-04 16:19:33,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 344 transitions, 4239 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-04 16:19:33,048 INFO L231 Difference]: Finished difference. Result has 323 places, 290 transitions, 3293 flow [2024-06-04 16:19:33,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3089, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3293, PETRI_PLACES=323, PETRI_TRANSITIONS=290} [2024-06-04 16:19:33,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-04 16:19:33,048 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 290 transitions, 3293 flow [2024-06-04 16:19:33,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:33,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:33,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:33,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 16:19:33,049 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:33,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:33,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1172171047, now seen corresponding path program 3 times [2024-06-04 16:19:33,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:33,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810882653] [2024-06-04 16:19:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:33,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:33,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:33,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810882653] [2024-06-04 16:19:33,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810882653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:33,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:33,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:19:33,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368220622] [2024-06-04 16:19:33,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:33,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:19:33,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:33,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:19:33,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:19:33,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:19:33,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 290 transitions, 3293 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:33,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:33,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:19:33,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:34,253 INFO L124 PetriNetUnfolderBase]: 2855/4977 cut-off events. [2024-06-04 16:19:34,254 INFO L125 PetriNetUnfolderBase]: For 995719/995719 co-relation queries the response was YES. [2024-06-04 16:19:34,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38822 conditions, 4977 events. 2855/4977 cut-off events. For 995719/995719 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34826 event pairs, 922 based on Foata normal form. 24/4991 useless extension candidates. Maximal degree in co-relation 38666. Up to 3928 conditions per place. [2024-06-04 16:19:34,313 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 194 selfloop transitions, 122 changer transitions 10/333 dead transitions. [2024-06-04 16:19:34,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 333 transitions, 4371 flow [2024-06-04 16:19:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:19:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:19:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-04 16:19:34,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5742793791574279 [2024-06-04 16:19:34,314 INFO L175 Difference]: Start difference. First operand has 323 places, 290 transitions, 3293 flow. Second operand 11 states and 259 transitions. [2024-06-04 16:19:34,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 333 transitions, 4371 flow [2024-06-04 16:19:40,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 333 transitions, 4133 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-04 16:19:40,368 INFO L231 Difference]: Finished difference. Result has 320 places, 287 transitions, 3277 flow [2024-06-04 16:19:40,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3061, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3277, PETRI_PLACES=320, PETRI_TRANSITIONS=287} [2024-06-04 16:19:40,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-04 16:19:40,368 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 287 transitions, 3277 flow [2024-06-04 16:19:40,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:40,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:40,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:40,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 16:19:40,369 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:40,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:40,369 INFO L85 PathProgramCache]: Analyzing trace with hash -601278641, now seen corresponding path program 4 times [2024-06-04 16:19:40,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:40,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271146103] [2024-06-04 16:19:40,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:40,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:40,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:40,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271146103] [2024-06-04 16:19:40,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271146103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:40,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:40,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:19:40,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243918424] [2024-06-04 16:19:40,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:40,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:19:40,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:40,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:19:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:19:40,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:19:40,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 287 transitions, 3277 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:40,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:40,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:19:40,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:41,534 INFO L124 PetriNetUnfolderBase]: 2704/4720 cut-off events. [2024-06-04 16:19:41,534 INFO L125 PetriNetUnfolderBase]: For 815875/815875 co-relation queries the response was YES. [2024-06-04 16:19:41,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34520 conditions, 4720 events. 2704/4720 cut-off events. For 815875/815875 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32871 event pairs, 877 based on Foata normal form. 26/4736 useless extension candidates. Maximal degree in co-relation 34366. Up to 3928 conditions per place. [2024-06-04 16:19:41,583 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 181 selfloop transitions, 117 changer transitions 18/323 dead transitions. [2024-06-04 16:19:41,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 323 transitions, 4045 flow [2024-06-04 16:19:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:19:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:19:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-04 16:19:41,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565410199556541 [2024-06-04 16:19:41,585 INFO L175 Difference]: Start difference. First operand has 320 places, 287 transitions, 3277 flow. Second operand 11 states and 251 transitions. [2024-06-04 16:19:41,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 323 transitions, 4045 flow [2024-06-04 16:19:45,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 323 transitions, 3800 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 16:19:45,980 INFO L231 Difference]: Finished difference. Result has 319 places, 281 transitions, 3213 flow [2024-06-04 16:19:45,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3213, PETRI_PLACES=319, PETRI_TRANSITIONS=281} [2024-06-04 16:19:45,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-04 16:19:45,980 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 281 transitions, 3213 flow [2024-06-04 16:19:45,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:45,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:45,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:45,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 16:19:45,981 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:45,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:45,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1902308273, now seen corresponding path program 5 times [2024-06-04 16:19:45,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:45,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689770266] [2024-06-04 16:19:45,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:45,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:46,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:46,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689770266] [2024-06-04 16:19:46,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689770266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:46,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:46,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:46,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511263147] [2024-06-04 16:19:46,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:46,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:46,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:46,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:46,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:46,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:19:46,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 281 transitions, 3213 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:46,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:46,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:19:46,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:47,206 INFO L124 PetriNetUnfolderBase]: 2904/5062 cut-off events. [2024-06-04 16:19:47,207 INFO L125 PetriNetUnfolderBase]: For 1051434/1051434 co-relation queries the response was YES. [2024-06-04 16:19:47,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41345 conditions, 5062 events. 2904/5062 cut-off events. For 1051434/1051434 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35546 event pairs, 901 based on Foata normal form. 18/5070 useless extension candidates. Maximal degree in co-relation 41192. Up to 3439 conditions per place. [2024-06-04 16:19:47,266 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 242 selfloop transitions, 75 changer transitions 8/332 dead transitions. [2024-06-04 16:19:47,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 332 transitions, 4553 flow [2024-06-04 16:19:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-04 16:19:47,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-04 16:19:47,267 INFO L175 Difference]: Start difference. First operand has 319 places, 281 transitions, 3213 flow. Second operand 10 states and 248 transitions. [2024-06-04 16:19:47,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 332 transitions, 4553 flow [2024-06-04 16:19:53,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 332 transitions, 4285 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-04 16:19:53,017 INFO L231 Difference]: Finished difference. Result has 311 places, 279 transitions, 3094 flow [2024-06-04 16:19:53,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3094, PETRI_PLACES=311, PETRI_TRANSITIONS=279} [2024-06-04 16:19:53,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-04 16:19:53,017 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 279 transitions, 3094 flow [2024-06-04 16:19:53,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:53,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:53,018 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, 1, 1] [2024-06-04 16:19:53,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 16:19:53,018 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:53,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1901952083, now seen corresponding path program 6 times [2024-06-04 16:19:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:53,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654536152] [2024-06-04 16:19:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:53,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:53,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654536152] [2024-06-04 16:19:53,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654536152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:53,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:53,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:53,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29351497] [2024-06-04 16:19:53,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:53,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:53,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:53,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:53,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:53,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:19:53,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 279 transitions, 3094 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:53,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:53,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:19:53,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:54,224 INFO L124 PetriNetUnfolderBase]: 2888/5033 cut-off events. [2024-06-04 16:19:54,224 INFO L125 PetriNetUnfolderBase]: For 997053/997053 co-relation queries the response was YES. [2024-06-04 16:19:54,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40771 conditions, 5033 events. 2888/5033 cut-off events. For 997053/997053 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35345 event pairs, 988 based on Foata normal form. 18/5034 useless extension candidates. Maximal degree in co-relation 40621. Up to 3439 conditions per place. [2024-06-04 16:19:54,281 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 69 changer transitions 14/323 dead transitions. [2024-06-04 16:19:54,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 323 transitions, 4138 flow [2024-06-04 16:19:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-04 16:19:54,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:19:54,282 INFO L175 Difference]: Start difference. First operand has 311 places, 279 transitions, 3094 flow. Second operand 10 states and 240 transitions. [2024-06-04 16:19:54,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 323 transitions, 4138 flow [2024-06-04 16:20:00,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 323 transitions, 3984 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:20:00,607 INFO L231 Difference]: Finished difference. Result has 311 places, 275 transitions, 3029 flow [2024-06-04 16:20:00,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3029, PETRI_PLACES=311, PETRI_TRANSITIONS=275} [2024-06-04 16:20:00,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-04 16:20:00,608 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 275 transitions, 3029 flow [2024-06-04 16:20:00,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:00,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:00,608 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, 1] [2024-06-04 16:20:00,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 16:20:00,609 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:00,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:00,609 INFO L85 PathProgramCache]: Analyzing trace with hash 428334163, now seen corresponding path program 7 times [2024-06-04 16:20:00,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:00,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791079746] [2024-06-04 16:20:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:00,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:00,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:00,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791079746] [2024-06-04 16:20:00,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791079746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:00,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:00,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:20:00,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319294487] [2024-06-04 16:20:00,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:00,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:20:00,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:00,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:20:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:20:01,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:20:01,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 275 transitions, 3029 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:01,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:01,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:20:01,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:01,969 INFO L124 PetriNetUnfolderBase]: 3005/5237 cut-off events. [2024-06-04 16:20:01,969 INFO L125 PetriNetUnfolderBase]: For 1179696/1179696 co-relation queries the response was YES. [2024-06-04 16:20:02,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44458 conditions, 5237 events. 3005/5237 cut-off events. For 1179696/1179696 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 37234 event pairs, 1077 based on Foata normal form. 24/5251 useless extension candidates. Maximal degree in co-relation 44308. Up to 4266 conditions per place. [2024-06-04 16:20:02,030 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 230 selfloop transitions, 67 changer transitions 10/314 dead transitions. [2024-06-04 16:20:02,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 314 transitions, 4047 flow [2024-06-04 16:20:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:20:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:20:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-04 16:20:02,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-04 16:20:02,031 INFO L175 Difference]: Start difference. First operand has 311 places, 275 transitions, 3029 flow. Second operand 10 states and 236 transitions. [2024-06-04 16:20:02,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 314 transitions, 4047 flow [2024-06-04 16:20:08,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 314 transitions, 3901 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 16:20:08,137 INFO L231 Difference]: Finished difference. Result has 309 places, 272 transitions, 2985 flow [2024-06-04 16:20:08,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2887, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2985, PETRI_PLACES=309, PETRI_TRANSITIONS=272} [2024-06-04 16:20:08,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-04 16:20:08,137 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 272 transitions, 2985 flow [2024-06-04 16:20:08,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:08,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:08,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:08,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 16:20:08,138 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:08,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1766515253, now seen corresponding path program 8 times [2024-06-04 16:20:08,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:08,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066313416] [2024-06-04 16:20:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:08,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:08,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:08,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066313416] [2024-06-04 16:20:08,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066313416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:08,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:08,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:20:08,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229627214] [2024-06-04 16:20:08,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:08,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:20:08,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:20:08,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:20:08,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:20:08,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 272 transitions, 2985 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:08,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:08,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:20:08,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:09,238 INFO L124 PetriNetUnfolderBase]: 2613/4573 cut-off events. [2024-06-04 16:20:09,239 INFO L125 PetriNetUnfolderBase]: For 745756/745756 co-relation queries the response was YES. [2024-06-04 16:20:09,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33055 conditions, 4573 events. 2613/4573 cut-off events. For 745756/745756 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31828 event pairs, 867 based on Foata normal form. 26/4589 useless extension candidates. Maximal degree in co-relation 32906. Up to 3875 conditions per place. [2024-06-04 16:20:09,289 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 220 selfloop transitions, 61 changer transitions 16/304 dead transitions. [2024-06-04 16:20:09,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 304 transitions, 3705 flow [2024-06-04 16:20:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:20:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:20:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-04 16:20:09,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-04 16:20:09,290 INFO L175 Difference]: Start difference. First operand has 309 places, 272 transitions, 2985 flow. Second operand 10 states and 228 transitions. [2024-06-04 16:20:09,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 304 transitions, 3705 flow [2024-06-04 16:20:13,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 304 transitions, 3570 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:20:13,536 INFO L231 Difference]: Finished difference. Result has 308 places, 265 transitions, 2906 flow [2024-06-04 16:20:13,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2850, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2906, PETRI_PLACES=308, PETRI_TRANSITIONS=265} [2024-06-04 16:20:13,542 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-04 16:20:13,542 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 265 transitions, 2906 flow [2024-06-04 16:20:13,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:13,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:13,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:13,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 16:20:13,542 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:13,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:13,543 INFO L85 PathProgramCache]: Analyzing trace with hash 620567823, now seen corresponding path program 9 times [2024-06-04 16:20:13,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:13,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492086117] [2024-06-04 16:20:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:13,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:13,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:13,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492086117] [2024-06-04 16:20:13,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492086117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:13,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:13,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:20:13,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327182109] [2024-06-04 16:20:13,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:13,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:20:13,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:13,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:20:13,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:20:13,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:20:13,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 265 transitions, 2906 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:13,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:13,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:20:13,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:14,703 INFO L124 PetriNetUnfolderBase]: 2688/4728 cut-off events. [2024-06-04 16:20:14,703 INFO L125 PetriNetUnfolderBase]: For 815618/815618 co-relation queries the response was YES. [2024-06-04 16:20:14,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35962 conditions, 4728 events. 2688/4728 cut-off events. For 815618/815618 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33073 event pairs, 844 based on Foata normal form. 18/4736 useless extension candidates. Maximal degree in co-relation 35814. Up to 2861 conditions per place. [2024-06-04 16:20:14,754 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 112 changer transitions 16/320 dead transitions. [2024-06-04 16:20:14,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 320 transitions, 4228 flow [2024-06-04 16:20:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:20:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:20:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-04 16:20:14,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5920177383592018 [2024-06-04 16:20:14,755 INFO L175 Difference]: Start difference. First operand has 308 places, 265 transitions, 2906 flow. Second operand 11 states and 267 transitions. [2024-06-04 16:20:14,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 320 transitions, 4228 flow [2024-06-04 16:20:20,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 320 transitions, 4081 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-04 16:20:20,024 INFO L231 Difference]: Finished difference. Result has 303 places, 262 transitions, 2964 flow [2024-06-04 16:20:20,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2964, PETRI_PLACES=303, PETRI_TRANSITIONS=262} [2024-06-04 16:20:20,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-04 16:20:20,025 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 262 transitions, 2964 flow [2024-06-04 16:20:20,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:20,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:20,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:20,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 16:20:20,025 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:20,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:20,025 INFO L85 PathProgramCache]: Analyzing trace with hash 215331279, now seen corresponding path program 10 times [2024-06-04 16:20:20,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:20,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728225985] [2024-06-04 16:20:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:20,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:20,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:20,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728225985] [2024-06-04 16:20:20,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728225985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:20,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:20,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:20:20,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145170485] [2024-06-04 16:20:20,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:20,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:20:20,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:20,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:20:20,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:20:20,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:20:20,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 262 transitions, 2964 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:20,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:20,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:20:20,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:21,249 INFO L124 PetriNetUnfolderBase]: 2686/4718 cut-off events. [2024-06-04 16:20:21,249 INFO L125 PetriNetUnfolderBase]: For 881296/881296 co-relation queries the response was YES. [2024-06-04 16:20:21,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37618 conditions, 4718 events. 2686/4718 cut-off events. For 881296/881296 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 32975 event pairs, 890 based on Foata normal form. 18/4726 useless extension candidates. Maximal degree in co-relation 37473. Up to 2861 conditions per place. [2024-06-04 16:20:21,302 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 107 changer transitions 8/313 dead transitions. [2024-06-04 16:20:21,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 313 transitions, 4232 flow [2024-06-04 16:20:21,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:20:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:20:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-04 16:20:21,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5831485587583148 [2024-06-04 16:20:21,304 INFO L175 Difference]: Start difference. First operand has 303 places, 262 transitions, 2964 flow. Second operand 11 states and 263 transitions. [2024-06-04 16:20:21,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 313 transitions, 4232 flow [2024-06-04 16:20:27,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 313 transitions, 3995 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-04 16:20:27,693 INFO L231 Difference]: Finished difference. Result has 300 places, 260 transitions, 2937 flow [2024-06-04 16:20:27,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2739, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2937, PETRI_PLACES=300, PETRI_TRANSITIONS=260} [2024-06-04 16:20:27,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-04 16:20:27,694 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 260 transitions, 2937 flow [2024-06-04 16:20:27,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:27,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:27,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:27,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 16:20:27,694 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:27,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:27,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1890326395, now seen corresponding path program 11 times [2024-06-04 16:20:27,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:27,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575666892] [2024-06-04 16:20:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:27,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:27,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:27,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575666892] [2024-06-04 16:20:27,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575666892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:27,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:27,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:20:27,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451035520] [2024-06-04 16:20:27,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:27,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:20:27,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:27,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:20:27,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:20:28,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:20:28,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 260 transitions, 2937 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:28,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:28,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:20:28,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:28,782 INFO L124 PetriNetUnfolderBase]: 2581/4531 cut-off events. [2024-06-04 16:20:28,782 INFO L125 PetriNetUnfolderBase]: For 756598/756598 co-relation queries the response was YES. [2024-06-04 16:20:28,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34782 conditions, 4531 events. 2581/4531 cut-off events. For 756598/756598 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31430 event pairs, 878 based on Foata normal form. 18/4539 useless extension candidates. Maximal degree in co-relation 34639. Up to 2861 conditions per place. [2024-06-04 16:20:28,831 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 104 changer transitions 19/306 dead transitions. [2024-06-04 16:20:28,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 306 transitions, 3939 flow [2024-06-04 16:20:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:20:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:20:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-06-04 16:20:28,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698447893569845 [2024-06-04 16:20:28,832 INFO L175 Difference]: Start difference. First operand has 300 places, 260 transitions, 2937 flow. Second operand 11 states and 257 transitions. [2024-06-04 16:20:28,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 306 transitions, 3939 flow [2024-06-04 16:20:34,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 306 transitions, 3718 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-04 16:20:34,926 INFO L231 Difference]: Finished difference. Result has 299 places, 256 transitions, 2874 flow [2024-06-04 16:20:34,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2874, PETRI_PLACES=299, PETRI_TRANSITIONS=256} [2024-06-04 16:20:34,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-04 16:20:34,926 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 256 transitions, 2874 flow [2024-06-04 16:20:34,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:34,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:34,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:34,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 16:20:34,927 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:34,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash -795725267, now seen corresponding path program 12 times [2024-06-04 16:20:34,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:34,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305641245] [2024-06-04 16:20:34,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:34,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:35,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:35,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305641245] [2024-06-04 16:20:35,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305641245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:35,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:35,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:20:35,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919989231] [2024-06-04 16:20:35,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:35,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:20:35,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:20:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:20:35,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:20:35,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 256 transitions, 2874 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:35,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:35,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:20:35,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:36,139 INFO L124 PetriNetUnfolderBase]: 2784/4870 cut-off events. [2024-06-04 16:20:36,139 INFO L125 PetriNetUnfolderBase]: For 990320/990320 co-relation queries the response was YES. [2024-06-04 16:20:36,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41160 conditions, 4870 events. 2784/4870 cut-off events. For 990320/990320 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 34269 event pairs, 965 based on Foata normal form. 18/4878 useless extension candidates. Maximal degree in co-relation 41018. Up to 3571 conditions per place. [2024-06-04 16:20:36,196 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 107 changer transitions 8/302 dead transitions. [2024-06-04 16:20:36,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 302 transitions, 4100 flow [2024-06-04 16:20:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:20:36,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:20:36,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-04 16:20:36,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5742793791574279 [2024-06-04 16:20:36,197 INFO L175 Difference]: Start difference. First operand has 299 places, 256 transitions, 2874 flow. Second operand 11 states and 259 transitions. [2024-06-04 16:20:36,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 302 transitions, 4100 flow [2024-06-04 16:20:40,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 302 transitions, 3890 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-04 16:20:40,467 INFO L231 Difference]: Finished difference. Result has 294 places, 254 transitions, 2873 flow [2024-06-04 16:20:40,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2873, PETRI_PLACES=294, PETRI_TRANSITIONS=254} [2024-06-04 16:20:40,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-04 16:20:40,468 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 254 transitions, 2873 flow [2024-06-04 16:20:40,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:40,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:40,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:40,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 16:20:40,469 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:40,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:40,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1616990341, now seen corresponding path program 13 times [2024-06-04 16:20:40,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:40,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122528040] [2024-06-04 16:20:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:40,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:40,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:40,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122528040] [2024-06-04 16:20:40,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122528040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:40,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:40,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:20:40,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715993627] [2024-06-04 16:20:40,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:40,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:20:40,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:40,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:20:40,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:20:40,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:20:40,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 254 transitions, 2873 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:40,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:40,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:20:40,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:41,649 INFO L124 PetriNetUnfolderBase]: 2874/5028 cut-off events. [2024-06-04 16:20:41,649 INFO L125 PetriNetUnfolderBase]: For 1067724/1067724 co-relation queries the response was YES. [2024-06-04 16:20:41,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43902 conditions, 5028 events. 2874/5028 cut-off events. For 1067724/1067724 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 35635 event pairs, 1047 based on Foata normal form. 18/5036 useless extension candidates. Maximal degree in co-relation 43762. Up to 3571 conditions per place. [2024-06-04 16:20:41,704 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 105 changer transitions 9/300 dead transitions. [2024-06-04 16:20:41,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 300 transitions, 4087 flow [2024-06-04 16:20:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:20:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:20:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-04 16:20:41,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5742793791574279 [2024-06-04 16:20:41,706 INFO L175 Difference]: Start difference. First operand has 294 places, 254 transitions, 2873 flow. Second operand 11 states and 259 transitions. [2024-06-04 16:20:41,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 300 transitions, 4087 flow [2024-06-04 16:20:45,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 300 transitions, 3857 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-04 16:20:45,680 INFO L231 Difference]: Finished difference. Result has 292 places, 251 transitions, 2835 flow [2024-06-04 16:20:45,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2835, PETRI_PLACES=292, PETRI_TRANSITIONS=251} [2024-06-04 16:20:45,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-04 16:20:45,680 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 251 transitions, 2835 flow [2024-06-04 16:20:45,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:45,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:45,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:45,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 16:20:45,681 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:45,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:45,681 INFO L85 PathProgramCache]: Analyzing trace with hash -14504147, now seen corresponding path program 14 times [2024-06-04 16:20:45,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:45,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303733606] [2024-06-04 16:20:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:45,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:45,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:45,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303733606] [2024-06-04 16:20:45,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303733606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:45,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:45,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:20:45,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106463972] [2024-06-04 16:20:45,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:45,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:20:45,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:20:45,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:20:46,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:20:46,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 251 transitions, 2835 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:46,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:46,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:20:46,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:46,844 INFO L124 PetriNetUnfolderBase]: 2754/4822 cut-off events. [2024-06-04 16:20:46,844 INFO L125 PetriNetUnfolderBase]: For 941994/941994 co-relation queries the response was YES. [2024-06-04 16:20:46,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40308 conditions, 4822 events. 2754/4822 cut-off events. For 941994/941994 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33900 event pairs, 1031 based on Foata normal form. 24/4836 useless extension candidates. Maximal degree in co-relation 40170. Up to 3805 conditions per place. [2024-06-04 16:20:47,081 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 104 changer transitions 10/291 dead transitions. [2024-06-04 16:20:47,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 291 transitions, 3787 flow [2024-06-04 16:20:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:20:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:20:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-04 16:20:47,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631929046563193 [2024-06-04 16:20:47,082 INFO L175 Difference]: Start difference. First operand has 292 places, 251 transitions, 2835 flow. Second operand 11 states and 254 transitions. [2024-06-04 16:20:47,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 291 transitions, 3787 flow [2024-06-04 16:20:50,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 291 transitions, 3566 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-04 16:20:50,967 INFO L231 Difference]: Finished difference. Result has 289 places, 248 transitions, 2796 flow [2024-06-04 16:20:50,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2796, PETRI_PLACES=289, PETRI_TRANSITIONS=248} [2024-06-04 16:20:50,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-04 16:20:50,975 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 248 transitions, 2796 flow [2024-06-04 16:20:50,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:50,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:50,975 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, 1] [2024-06-04 16:20:50,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 16:20:50,975 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:50,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:50,976 INFO L85 PathProgramCache]: Analyzing trace with hash -153269447, now seen corresponding path program 15 times [2024-06-04 16:20:50,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:50,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652257109] [2024-06-04 16:20:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:50,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:51,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:51,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652257109] [2024-06-04 16:20:51,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652257109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:51,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:51,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:20:51,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476980705] [2024-06-04 16:20:51,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:51,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:20:51,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:51,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:20:51,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:20:51,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:20:51,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 248 transitions, 2796 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:51,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:51,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:20:51,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:52,109 INFO L124 PetriNetUnfolderBase]: 2730/4770 cut-off events. [2024-06-04 16:20:52,109 INFO L125 PetriNetUnfolderBase]: For 917002/917002 co-relation queries the response was YES. [2024-06-04 16:20:52,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39702 conditions, 4770 events. 2730/4770 cut-off events. For 917002/917002 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 33434 event pairs, 1063 based on Foata normal form. 26/4786 useless extension candidates. Maximal degree in co-relation 39566. Up to 4016 conditions per place. [2024-06-04 16:20:52,163 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 161 selfloop transitions, 100 changer transitions 13/281 dead transitions. [2024-06-04 16:20:52,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 281 transitions, 3472 flow [2024-06-04 16:20:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:20:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:20:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-04 16:20:52,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521064301552107 [2024-06-04 16:20:52,164 INFO L175 Difference]: Start difference. First operand has 289 places, 248 transitions, 2796 flow. Second operand 11 states and 249 transitions. [2024-06-04 16:20:52,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 281 transitions, 3472 flow [2024-06-04 16:20:55,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 281 transitions, 3266 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 16:20:55,848 INFO L231 Difference]: Finished difference. Result has 287 places, 243 transitions, 2750 flow [2024-06-04 16:20:55,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2750, PETRI_PLACES=287, PETRI_TRANSITIONS=243} [2024-06-04 16:20:55,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-04 16:20:55,848 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 243 transitions, 2750 flow [2024-06-04 16:20:55,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:55,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:55,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:55,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 16:20:55,849 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:55,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash -363616847, now seen corresponding path program 16 times [2024-06-04 16:20:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:55,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298249356] [2024-06-04 16:20:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:55,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:56,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:56,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298249356] [2024-06-04 16:20:56,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298249356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:56,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:56,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:20:56,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364016977] [2024-06-04 16:20:56,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:56,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:20:56,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:56,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:20:56,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:20:56,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:20:56,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 243 transitions, 2750 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:56,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:56,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:20:56,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:56,922 INFO L124 PetriNetUnfolderBase]: 2600/4556 cut-off events. [2024-06-04 16:20:56,922 INFO L125 PetriNetUnfolderBase]: For 783275/783275 co-relation queries the response was YES. [2024-06-04 16:20:56,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36259 conditions, 4556 events. 2600/4556 cut-off events. For 783275/783275 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 31711 event pairs, 939 based on Foata normal form. 24/4570 useless extension candidates. Maximal degree in co-relation 36124. Up to 3571 conditions per place. [2024-06-04 16:20:56,969 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 98 changer transitions 10/283 dead transitions. [2024-06-04 16:20:56,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 283 transitions, 3680 flow [2024-06-04 16:20:56,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:20:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:20:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-04 16:20:56,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565410199556541 [2024-06-04 16:20:56,970 INFO L175 Difference]: Start difference. First operand has 287 places, 243 transitions, 2750 flow. Second operand 11 states and 251 transitions. [2024-06-04 16:20:56,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 283 transitions, 3680 flow [2024-06-04 16:20:59,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 283 transitions, 3462 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-04 16:20:59,422 INFO L231 Difference]: Finished difference. Result has 283 places, 240 transitions, 2707 flow [2024-06-04 16:20:59,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2542, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2707, PETRI_PLACES=283, PETRI_TRANSITIONS=240} [2024-06-04 16:20:59,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-04 16:20:59,422 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 240 transitions, 2707 flow [2024-06-04 16:20:59,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:59,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:59,423 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, 1, 1] [2024-06-04 16:20:59,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 16:20:59,423 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:59,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:59,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1160698669, now seen corresponding path program 17 times [2024-06-04 16:20:59,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:59,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287744056] [2024-06-04 16:20:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:59,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:59,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:59,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287744056] [2024-06-04 16:20:59,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287744056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:59,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:59,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:20:59,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350713991] [2024-06-04 16:20:59,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:59,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:20:59,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:59,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:20:59,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:20:59,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:20:59,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 240 transitions, 2707 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:59,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:59,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:20:59,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:00,471 INFO L124 PetriNetUnfolderBase]: 2449/4299 cut-off events. [2024-06-04 16:21:00,471 INFO L125 PetriNetUnfolderBase]: For 652636/652636 co-relation queries the response was YES. [2024-06-04 16:21:00,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32129 conditions, 4299 events. 2449/4299 cut-off events. For 652636/652636 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29659 event pairs, 894 based on Foata normal form. 26/4315 useless extension candidates. Maximal degree in co-relation 31996. Up to 3571 conditions per place. [2024-06-04 16:21:00,507 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 154 selfloop transitions, 92 changer transitions 20/273 dead transitions. [2024-06-04 16:21:00,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 273 transitions, 3365 flow [2024-06-04 16:21:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:21:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:21:00,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-04 16:21:00,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388026607538803 [2024-06-04 16:21:00,508 INFO L175 Difference]: Start difference. First operand has 283 places, 240 transitions, 2707 flow. Second operand 11 states and 243 transitions. [2024-06-04 16:21:00,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 273 transitions, 3365 flow [2024-06-04 16:21:03,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 273 transitions, 3168 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 16:21:03,008 INFO L231 Difference]: Finished difference. Result has 281 places, 233 transitions, 2627 flow [2024-06-04 16:21:03,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2627, PETRI_PLACES=281, PETRI_TRANSITIONS=233} [2024-06-04 16:21:03,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-04 16:21:03,009 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 233 transitions, 2627 flow [2024-06-04 16:21:03,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:03,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:03,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:03,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 16:21:03,010 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:03,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:03,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1488479341, now seen corresponding path program 18 times [2024-06-04 16:21:03,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:03,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124297936] [2024-06-04 16:21:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:03,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:03,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:03,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124297936] [2024-06-04 16:21:03,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124297936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:03,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:03,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:03,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766140720] [2024-06-04 16:21:03,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:03,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:03,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:03,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:03,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:03,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:03,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 233 transitions, 2627 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:03,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:03,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:03,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:04,041 INFO L124 PetriNetUnfolderBase]: 2435/4261 cut-off events. [2024-06-04 16:21:04,041 INFO L125 PetriNetUnfolderBase]: For 639192/639192 co-relation queries the response was YES. [2024-06-04 16:21:04,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31807 conditions, 4261 events. 2435/4261 cut-off events. For 639192/639192 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 29253 event pairs, 894 based on Foata normal form. 26/4277 useless extension candidates. Maximal degree in co-relation 31675. Up to 3613 conditions per place. [2024-06-04 16:21:04,087 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 59 changer transitions 12/263 dead transitions. [2024-06-04 16:21:04,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 263 transitions, 3257 flow [2024-06-04 16:21:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:21:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:21:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-04 16:21:04,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:21:04,089 INFO L175 Difference]: Start difference. First operand has 281 places, 233 transitions, 2627 flow. Second operand 11 states and 242 transitions. [2024-06-04 16:21:04,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 263 transitions, 3257 flow [2024-06-04 16:21:06,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 263 transitions, 3051 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-04 16:21:06,314 INFO L231 Difference]: Finished difference. Result has 272 places, 229 transitions, 2512 flow [2024-06-04 16:21:06,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2512, PETRI_PLACES=272, PETRI_TRANSITIONS=229} [2024-06-04 16:21:06,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-04 16:21:06,315 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 229 transitions, 2512 flow [2024-06-04 16:21:06,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:06,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:06,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:06,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 16:21:06,315 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:06,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:06,316 INFO L85 PathProgramCache]: Analyzing trace with hash -852963531, now seen corresponding path program 19 times [2024-06-04 16:21:06,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:06,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442080815] [2024-06-04 16:21:06,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:06,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:06,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442080815] [2024-06-04 16:21:06,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442080815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:06,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:06,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:06,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287510847] [2024-06-04 16:21:06,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:06,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:06,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:06,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:06,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:06,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 229 transitions, 2512 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:06,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:06,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:06,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:07,357 INFO L124 PetriNetUnfolderBase]: 2420/4254 cut-off events. [2024-06-04 16:21:07,357 INFO L125 PetriNetUnfolderBase]: For 590527/590527 co-relation queries the response was YES. [2024-06-04 16:21:07,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30986 conditions, 4254 events. 2420/4254 cut-off events. For 590527/590527 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 29254 event pairs, 858 based on Foata normal form. 24/4268 useless extension candidates. Maximal degree in co-relation 30857. Up to 3565 conditions per place. [2024-06-04 16:21:07,399 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 183 selfloop transitions, 56 changer transitions 17/263 dead transitions. [2024-06-04 16:21:07,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 263 transitions, 3180 flow [2024-06-04 16:21:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:21:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:21:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-04 16:21:07,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388026607538803 [2024-06-04 16:21:07,401 INFO L175 Difference]: Start difference. First operand has 272 places, 229 transitions, 2512 flow. Second operand 11 states and 243 transitions. [2024-06-04 16:21:07,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 263 transitions, 3180 flow [2024-06-04 16:21:09,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 263 transitions, 3058 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 16:21:09,826 INFO L231 Difference]: Finished difference. Result has 270 places, 225 transitions, 2456 flow [2024-06-04 16:21:09,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2456, PETRI_PLACES=270, PETRI_TRANSITIONS=225} [2024-06-04 16:21:09,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-04 16:21:09,827 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 225 transitions, 2456 flow [2024-06-04 16:21:09,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:09,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:09,828 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, 1] [2024-06-04 16:21:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 16:21:09,828 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:09,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:09,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1904157183, now seen corresponding path program 1 times [2024-06-04 16:21:09,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:09,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472863634] [2024-06-04 16:21:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:10,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:10,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472863634] [2024-06-04 16:21:10,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472863634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:10,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:10,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:10,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909162672] [2024-06-04 16:21:10,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:10,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:10,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:10,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:10,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:10,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:10,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 225 transitions, 2456 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:10,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:10,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:10,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:10,929 INFO L124 PetriNetUnfolderBase]: 2575/4505 cut-off events. [2024-06-04 16:21:10,929 INFO L125 PetriNetUnfolderBase]: For 717885/717885 co-relation queries the response was YES. [2024-06-04 16:21:10,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35631 conditions, 4505 events. 2575/4505 cut-off events. For 717885/717885 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 31176 event pairs, 927 based on Foata normal form. 18/4513 useless extension candidates. Maximal degree in co-relation 35503. Up to 3427 conditions per place. [2024-06-04 16:21:10,980 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 195 selfloop transitions, 57 changer transitions 8/267 dead transitions. [2024-06-04 16:21:10,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 267 transitions, 3524 flow [2024-06-04 16:21:10,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:21:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:21:10,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-04 16:21:10,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543237250554324 [2024-06-04 16:21:10,981 INFO L175 Difference]: Start difference. First operand has 270 places, 225 transitions, 2456 flow. Second operand 11 states and 250 transitions. [2024-06-04 16:21:10,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 267 transitions, 3524 flow [2024-06-04 16:21:13,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 267 transitions, 3392 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-04 16:21:13,092 INFO L231 Difference]: Finished difference. Result has 266 places, 223 transitions, 2430 flow [2024-06-04 16:21:13,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2430, PETRI_PLACES=266, PETRI_TRANSITIONS=223} [2024-06-04 16:21:13,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-04 16:21:13,092 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 223 transitions, 2430 flow [2024-06-04 16:21:13,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:13,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:13,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:13,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 16:21:13,093 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:13,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:13,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1908918783, now seen corresponding path program 2 times [2024-06-04 16:21:13,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:13,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404361096] [2024-06-04 16:21:13,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:13,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:13,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:13,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404361096] [2024-06-04 16:21:13,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404361096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:13,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:13,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:13,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548935340] [2024-06-04 16:21:13,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:13,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:13,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:13,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:13,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:13,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:13,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 223 transitions, 2430 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:13,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:13,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:13,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:14,098 INFO L124 PetriNetUnfolderBase]: 2470/4318 cut-off events. [2024-06-04 16:21:14,098 INFO L125 PetriNetUnfolderBase]: For 622683/622683 co-relation queries the response was YES. [2024-06-04 16:21:14,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33027 conditions, 4318 events. 2470/4318 cut-off events. For 622683/622683 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29681 event pairs, 909 based on Foata normal form. 18/4326 useless extension candidates. Maximal degree in co-relation 32901. Up to 3764 conditions per place. [2024-06-04 16:21:14,141 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 204 selfloop transitions, 10 changer transitions 26/247 dead transitions. [2024-06-04 16:21:14,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 247 transitions, 3010 flow [2024-06-04 16:21:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:21:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:21:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 16:21:14,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 16:21:14,142 INFO L175 Difference]: Start difference. First operand has 266 places, 223 transitions, 2430 flow. Second operand 8 states and 174 transitions. [2024-06-04 16:21:14,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 247 transitions, 3010 flow [2024-06-04 16:21:16,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 247 transitions, 2851 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-04 16:21:16,299 INFO L231 Difference]: Finished difference. Result has 261 places, 216 transitions, 2209 flow [2024-06-04 16:21:16,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2209, PETRI_PLACES=261, PETRI_TRANSITIONS=216} [2024-06-04 16:21:16,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-04 16:21:16,300 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 216 transitions, 2209 flow [2024-06-04 16:21:16,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:16,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:16,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:16,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 16:21:16,300 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:16,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash 17456207, now seen corresponding path program 20 times [2024-06-04 16:21:16,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:16,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87165315] [2024-06-04 16:21:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:16,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:16,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:16,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87165315] [2024-06-04 16:21:16,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87165315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:16,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:16,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:16,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219175569] [2024-06-04 16:21:16,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:16,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:16,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:16,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:16,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:16,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:16,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 216 transitions, 2209 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:16,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:16,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:16,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:17,350 INFO L124 PetriNetUnfolderBase]: 2546/4452 cut-off events. [2024-06-04 16:21:17,351 INFO L125 PetriNetUnfolderBase]: For 686456/686456 co-relation queries the response was YES. [2024-06-04 16:21:17,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35099 conditions, 4452 events. 2546/4452 cut-off events. For 686456/686456 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30684 event pairs, 841 based on Foata normal form. 18/4461 useless extension candidates. Maximal degree in co-relation 34975. Up to 3014 conditions per place. [2024-06-04 16:21:17,394 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 57 changer transitions 7/256 dead transitions. [2024-06-04 16:21:17,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 256 transitions, 3249 flow [2024-06-04 16:21:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:21:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:21:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 16:21:17,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-04 16:21:17,395 INFO L175 Difference]: Start difference. First operand has 261 places, 216 transitions, 2209 flow. Second operand 8 states and 201 transitions. [2024-06-04 16:21:17,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 256 transitions, 3249 flow [2024-06-04 16:21:19,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 256 transitions, 3178 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-04 16:21:19,009 INFO L231 Difference]: Finished difference. Result has 251 places, 215 transitions, 2260 flow [2024-06-04 16:21:19,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2260, PETRI_PLACES=251, PETRI_TRANSITIONS=215} [2024-06-04 16:21:19,010 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-04 16:21:19,010 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 215 transitions, 2260 flow [2024-06-04 16:21:19,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:19,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:19,010 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, 1] [2024-06-04 16:21:19,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 16:21:19,011 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:19,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash 17812397, now seen corresponding path program 21 times [2024-06-04 16:21:19,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:19,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031280500] [2024-06-04 16:21:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:19,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:19,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:19,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031280500] [2024-06-04 16:21:19,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031280500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:19,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:19,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:19,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589825324] [2024-06-04 16:21:19,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:19,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:19,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:19,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:19,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:19,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:19,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 215 transitions, 2260 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:19,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:19,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:19,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:20,075 INFO L124 PetriNetUnfolderBase]: 2648/4613 cut-off events. [2024-06-04 16:21:20,075 INFO L125 PetriNetUnfolderBase]: For 736665/736665 co-relation queries the response was YES. [2024-06-04 16:21:20,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37556 conditions, 4613 events. 2648/4613 cut-off events. For 736665/736665 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32032 event pairs, 932 based on Foata normal form. 18/4615 useless extension candidates. Maximal degree in co-relation 37437. Up to 3014 conditions per place. [2024-06-04 16:21:20,123 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 184 selfloop transitions, 53 changer transitions 8/252 dead transitions. [2024-06-04 16:21:20,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 252 transitions, 3276 flow [2024-06-04 16:21:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:21:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:21:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 16:21:20,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-04 16:21:20,124 INFO L175 Difference]: Start difference. First operand has 251 places, 215 transitions, 2260 flow. Second operand 8 states and 197 transitions. [2024-06-04 16:21:20,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 252 transitions, 3276 flow [2024-06-04 16:21:21,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 252 transitions, 3150 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:21:21,736 INFO L231 Difference]: Finished difference. Result has 250 places, 213 transitions, 2222 flow [2024-06-04 16:21:21,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2222, PETRI_PLACES=250, PETRI_TRANSITIONS=213} [2024-06-04 16:21:21,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-04 16:21:21,736 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 213 transitions, 2222 flow [2024-06-04 16:21:21,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:21,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:21,737 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, 1] [2024-06-04 16:21:21,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 16:21:21,737 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:21,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:21,737 INFO L85 PathProgramCache]: Analyzing trace with hash 803281807, now seen corresponding path program 22 times [2024-06-04 16:21:21,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:21,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138732732] [2024-06-04 16:21:21,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:21,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:22,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:22,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138732732] [2024-06-04 16:21:22,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138732732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:22,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:22,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:21:22,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285926387] [2024-06-04 16:21:22,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:22,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:21:22,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:21:22,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:21:22,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:22,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 213 transitions, 2222 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:22,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:22,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:22,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:22,859 INFO L124 PetriNetUnfolderBase]: 2852/4990 cut-off events. [2024-06-04 16:21:22,859 INFO L125 PetriNetUnfolderBase]: For 891922/891922 co-relation queries the response was YES. [2024-06-04 16:21:22,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42896 conditions, 4990 events. 2852/4990 cut-off events. For 891922/891922 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 35482 event pairs, 1096 based on Foata normal form. 18/4999 useless extension candidates. Maximal degree in co-relation 42778. Up to 2283 conditions per place. [2024-06-04 16:21:22,909 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 139 selfloop transitions, 95 changer transitions 16/257 dead transitions. [2024-06-04 16:21:22,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 257 transitions, 3278 flow [2024-06-04 16:21:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-04 16:21:22,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962059620596206 [2024-06-04 16:21:22,911 INFO L175 Difference]: Start difference. First operand has 250 places, 213 transitions, 2222 flow. Second operand 9 states and 220 transitions. [2024-06-04 16:21:22,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 257 transitions, 3278 flow [2024-06-04 16:21:25,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 257 transitions, 3161 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:21:25,827 INFO L231 Difference]: Finished difference. Result has 250 places, 210 transitions, 2273 flow [2024-06-04 16:21:25,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2273, PETRI_PLACES=250, PETRI_TRANSITIONS=210} [2024-06-04 16:21:25,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-04 16:21:25,827 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 210 transitions, 2273 flow [2024-06-04 16:21:25,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:25,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:25,828 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, 1] [2024-06-04 16:21:25,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 16:21:25,828 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:25,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:25,828 INFO L85 PathProgramCache]: Analyzing trace with hash 838372747, now seen corresponding path program 23 times [2024-06-04 16:21:25,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:25,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824438972] [2024-06-04 16:21:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:25,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:26,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:26,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824438972] [2024-06-04 16:21:26,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824438972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:26,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:26,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:21:26,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915119206] [2024-06-04 16:21:26,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:26,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:21:26,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:21:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:21:26,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:26,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 210 transitions, 2273 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:26,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:26,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:26,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:27,085 INFO L124 PetriNetUnfolderBase]: 2723/4759 cut-off events. [2024-06-04 16:21:27,086 INFO L125 PetriNetUnfolderBase]: For 845619/845619 co-relation queries the response was YES. [2024-06-04 16:21:27,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41127 conditions, 4759 events. 2723/4759 cut-off events. For 845619/845619 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 33310 event pairs, 1043 based on Foata normal form. 18/4768 useless extension candidates. Maximal degree in co-relation 41010. Up to 2283 conditions per place. [2024-06-04 16:21:27,127 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 153 selfloop transitions, 86 changer transitions 8/254 dead transitions. [2024-06-04 16:21:27,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 254 transitions, 3491 flow [2024-06-04 16:21:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-04 16:21:27,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962059620596206 [2024-06-04 16:21:27,128 INFO L175 Difference]: Start difference. First operand has 250 places, 210 transitions, 2273 flow. Second operand 9 states and 220 transitions. [2024-06-04 16:21:27,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 254 transitions, 3491 flow [2024-06-04 16:21:28,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 254 transitions, 3287 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 16:21:28,707 INFO L231 Difference]: Finished difference. Result has 247 places, 208 transitions, 2244 flow [2024-06-04 16:21:28,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2244, PETRI_PLACES=247, PETRI_TRANSITIONS=208} [2024-06-04 16:21:28,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-04 16:21:28,708 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 208 transitions, 2244 flow [2024-06-04 16:21:28,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:28,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:28,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:28,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 16:21:28,708 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:28,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:28,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1964990765, now seen corresponding path program 24 times [2024-06-04 16:21:28,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:28,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460250488] [2024-06-04 16:21:28,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:28,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:29,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:29,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460250488] [2024-06-04 16:21:29,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460250488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:29,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:29,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:21:29,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494688120] [2024-06-04 16:21:29,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:29,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:21:29,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:29,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:21:29,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:21:29,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:29,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 208 transitions, 2244 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:29,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:29,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:29,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:29,793 INFO L124 PetriNetUnfolderBase]: 2618/4572 cut-off events. [2024-06-04 16:21:29,793 INFO L125 PetriNetUnfolderBase]: For 750131/750131 co-relation queries the response was YES. [2024-06-04 16:21:29,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38577 conditions, 4572 events. 2618/4572 cut-off events. For 750131/750131 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31688 event pairs, 1031 based on Foata normal form. 18/4581 useless extension candidates. Maximal degree in co-relation 38462. Up to 2283 conditions per place. [2024-06-04 16:21:29,838 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 149 selfloop transitions, 84 changer transitions 10/250 dead transitions. [2024-06-04 16:21:29,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 250 transitions, 3286 flow [2024-06-04 16:21:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:21:29,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-04 16:21:29,839 INFO L175 Difference]: Start difference. First operand has 247 places, 208 transitions, 2244 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:21:29,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 250 transitions, 3286 flow [2024-06-04 16:21:32,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 250 transitions, 3103 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:21:32,005 INFO L231 Difference]: Finished difference. Result has 246 places, 204 transitions, 2184 flow [2024-06-04 16:21:32,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2184, PETRI_PLACES=246, PETRI_TRANSITIONS=204} [2024-06-04 16:21:32,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-04 16:21:32,005 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 204 transitions, 2184 flow [2024-06-04 16:21:32,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:32,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:32,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:32,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 16:21:32,006 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:32,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash -189197233, now seen corresponding path program 25 times [2024-06-04 16:21:32,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:32,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922574790] [2024-06-04 16:21:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:32,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:32,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:32,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922574790] [2024-06-04 16:21:32,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922574790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:32,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:32,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:32,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333825645] [2024-06-04 16:21:32,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:32,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:32,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:32,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:32,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:32,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:32,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 204 transitions, 2184 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:32,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:32,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:32,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:33,068 INFO L124 PetriNetUnfolderBase]: 2613/4557 cut-off events. [2024-06-04 16:21:33,068 INFO L125 PetriNetUnfolderBase]: For 754647/754647 co-relation queries the response was YES. [2024-06-04 16:21:33,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38475 conditions, 4557 events. 2613/4557 cut-off events. For 754647/754647 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31568 event pairs, 1057 based on Foata normal form. 24/4572 useless extension candidates. Maximal degree in co-relation 38361. Up to 3592 conditions per place. [2024-06-04 16:21:33,114 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 53 changer transitions 8/238 dead transitions. [2024-06-04 16:21:33,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 238 transitions, 2970 flow [2024-06-04 16:21:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:21:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:21:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:21:33,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:21:33,115 INFO L175 Difference]: Start difference. First operand has 246 places, 204 transitions, 2184 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:21:33,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 238 transitions, 2970 flow [2024-06-04 16:21:35,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 238 transitions, 2783 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-04 16:21:35,446 INFO L231 Difference]: Finished difference. Result has 240 places, 203 transitions, 2102 flow [2024-06-04 16:21:35,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2102, PETRI_PLACES=240, PETRI_TRANSITIONS=203} [2024-06-04 16:21:35,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-04 16:21:35,447 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 203 transitions, 2102 flow [2024-06-04 16:21:35,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:35,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:35,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:35,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 16:21:35,447 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:35,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash -189049363, now seen corresponding path program 26 times [2024-06-04 16:21:35,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:35,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525644379] [2024-06-04 16:21:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:35,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:35,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:35,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525644379] [2024-06-04 16:21:35,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525644379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:35,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:35,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:35,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68629479] [2024-06-04 16:21:35,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:35,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:35,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:35,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:35,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:35,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 203 transitions, 2102 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:35,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:35,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:35,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:36,455 INFO L124 PetriNetUnfolderBase]: 2491/4323 cut-off events. [2024-06-04 16:21:36,455 INFO L125 PetriNetUnfolderBase]: For 660168/660168 co-relation queries the response was YES. [2024-06-04 16:21:36,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35252 conditions, 4323 events. 2491/4323 cut-off events. For 660168/660168 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29815 event pairs, 1056 based on Foata normal form. 26/4340 useless extension candidates. Maximal degree in co-relation 35140. Up to 3753 conditions per place. [2024-06-04 16:21:36,497 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 49 changer transitions 12/227 dead transitions. [2024-06-04 16:21:36,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 227 transitions, 2644 flow [2024-06-04 16:21:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:21:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:21:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:21:36,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 16:21:36,498 INFO L175 Difference]: Start difference. First operand has 240 places, 203 transitions, 2102 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:21:36,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 227 transitions, 2644 flow [2024-06-04 16:21:38,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 227 transitions, 2480 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-04 16:21:38,900 INFO L231 Difference]: Finished difference. Result has 237 places, 199 transitions, 2015 flow [2024-06-04 16:21:38,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2015, PETRI_PLACES=237, PETRI_TRANSITIONS=199} [2024-06-04 16:21:38,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-04 16:21:38,900 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 199 transitions, 2015 flow [2024-06-04 16:21:38,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:38,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:38,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:38,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 16:21:38,901 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:38,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:38,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1705241555, now seen corresponding path program 27 times [2024-06-04 16:21:38,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:38,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136239589] [2024-06-04 16:21:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:38,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:39,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:39,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136239589] [2024-06-04 16:21:39,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136239589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:39,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:39,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:39,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418049034] [2024-06-04 16:21:39,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:39,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:39,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:39,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:39,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:39,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 199 transitions, 2015 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:39,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:39,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:39,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:39,870 INFO L124 PetriNetUnfolderBase]: 2476/4324 cut-off events. [2024-06-04 16:21:39,870 INFO L125 PetriNetUnfolderBase]: For 632796/632796 co-relation queries the response was YES. [2024-06-04 16:21:39,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34342 conditions, 4324 events. 2476/4324 cut-off events. For 632796/632796 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29944 event pairs, 1028 based on Foata normal form. 24/4339 useless extension candidates. Maximal degree in co-relation 34232. Up to 3494 conditions per place. [2024-06-04 16:21:39,910 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 166 selfloop transitions, 44 changer transitions 10/227 dead transitions. [2024-06-04 16:21:39,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 2753 flow [2024-06-04 16:21:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:21:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:21:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:21:39,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-04 16:21:39,911 INFO L175 Difference]: Start difference. First operand has 237 places, 199 transitions, 2015 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:21:39,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 2753 flow [2024-06-04 16:21:41,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 227 transitions, 2647 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:21:41,546 INFO L231 Difference]: Finished difference. Result has 235 places, 196 transitions, 1973 flow [2024-06-04 16:21:41,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1973, PETRI_PLACES=235, PETRI_TRANSITIONS=196} [2024-06-04 16:21:41,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-04 16:21:41,546 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 196 transitions, 1973 flow [2024-06-04 16:21:41,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:41,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:41,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:41,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 16:21:41,547 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:41,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:41,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1665544615, now seen corresponding path program 28 times [2024-06-04 16:21:41,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:41,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836708495] [2024-06-04 16:21:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:41,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:41,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:41,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836708495] [2024-06-04 16:21:41,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836708495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:41,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:41,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:41,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578049925] [2024-06-04 16:21:41,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:41,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:41,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:41,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:41,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:41,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 196 transitions, 1973 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:41,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:41,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:41,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:42,453 INFO L124 PetriNetUnfolderBase]: 2325/4067 cut-off events. [2024-06-04 16:21:42,453 INFO L125 PetriNetUnfolderBase]: For 552453/552453 co-relation queries the response was YES. [2024-06-04 16:21:42,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31086 conditions, 4067 events. 2325/4067 cut-off events. For 552453/552453 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27861 event pairs, 983 based on Foata normal form. 26/4084 useless extension candidates. Maximal degree in co-relation 30977. Up to 3494 conditions per place. [2024-06-04 16:21:42,489 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 40 changer transitions 14/217 dead transitions. [2024-06-04 16:21:42,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 217 transitions, 2485 flow [2024-06-04 16:21:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:21:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:21:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-04 16:21:42,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-04 16:21:42,491 INFO L175 Difference]: Start difference. First operand has 235 places, 196 transitions, 1973 flow. Second operand 8 states and 181 transitions. [2024-06-04 16:21:42,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 217 transitions, 2485 flow [2024-06-04 16:21:44,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 217 transitions, 2396 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:21:44,052 INFO L231 Difference]: Finished difference. Result has 234 places, 191 transitions, 1927 flow [2024-06-04 16:21:44,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1927, PETRI_PLACES=234, PETRI_TRANSITIONS=191} [2024-06-04 16:21:44,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-04 16:21:44,053 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 191 transitions, 1927 flow [2024-06-04 16:21:44,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:44,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:44,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:44,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 16:21:44,053 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:44,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:44,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1662703025, now seen corresponding path program 29 times [2024-06-04 16:21:44,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:44,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411281694] [2024-06-04 16:21:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:44,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:44,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:44,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411281694] [2024-06-04 16:21:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411281694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:44,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:44,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:21:44,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880469252] [2024-06-04 16:21:44,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:44,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:21:44,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:21:44,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:21:44,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:44,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 191 transitions, 1927 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:44,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:44,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:44,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:45,008 INFO L124 PetriNetUnfolderBase]: 2309/4047 cut-off events. [2024-06-04 16:21:45,009 INFO L125 PetriNetUnfolderBase]: For 528555/528555 co-relation queries the response was YES. [2024-06-04 16:21:45,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30763 conditions, 4047 events. 2309/4047 cut-off events. For 528555/528555 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 27574 event pairs, 923 based on Foata normal form. 24/4062 useless extension candidates. Maximal degree in co-relation 30655. Up to 2865 conditions per place. [2024-06-04 16:21:45,046 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 124 selfloop transitions, 80 changer transitions 19/230 dead transitions. [2024-06-04 16:21:45,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 230 transitions, 2723 flow [2024-06-04 16:21:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-04 16:21:45,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:21:45,047 INFO L175 Difference]: Start difference. First operand has 234 places, 191 transitions, 1927 flow. Second operand 9 states and 216 transitions. [2024-06-04 16:21:45,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 230 transitions, 2723 flow [2024-06-04 16:21:46,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 230 transitions, 2631 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:21:46,742 INFO L231 Difference]: Finished difference. Result has 230 places, 187 transitions, 1960 flow [2024-06-04 16:21:46,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1960, PETRI_PLACES=230, PETRI_TRANSITIONS=187} [2024-06-04 16:21:46,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-04 16:21:46,743 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 187 transitions, 1960 flow [2024-06-04 16:21:46,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:46,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:46,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:46,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 16:21:46,743 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:46,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash -133464787, now seen corresponding path program 30 times [2024-06-04 16:21:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:46,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332491635] [2024-06-04 16:21:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:46,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:47,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:47,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332491635] [2024-06-04 16:21:47,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332491635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:47,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:47,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:21:47,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93734186] [2024-06-04 16:21:47,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:47,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:21:47,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:47,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:21:47,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:21:47,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:47,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 187 transitions, 1960 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:47,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:47,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:47,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:47,598 INFO L124 PetriNetUnfolderBase]: 2205/3875 cut-off events. [2024-06-04 16:21:47,598 INFO L125 PetriNetUnfolderBase]: For 504480/504480 co-relation queries the response was YES. [2024-06-04 16:21:47,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29690 conditions, 3875 events. 2205/3875 cut-off events. For 504480/504480 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26232 event pairs, 957 based on Foata normal form. 26/3892 useless extension candidates. Maximal degree in co-relation 29584. Up to 3256 conditions per place. [2024-06-04 16:21:47,632 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 115 selfloop transitions, 78 changer transitions 12/212 dead transitions. [2024-06-04 16:21:47,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 212 transitions, 2472 flow [2024-06-04 16:21:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-04 16:21:47,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-04 16:21:47,633 INFO L175 Difference]: Start difference. First operand has 230 places, 187 transitions, 1960 flow. Second operand 9 states and 205 transitions. [2024-06-04 16:21:47,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 212 transitions, 2472 flow [2024-06-04 16:21:48,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 212 transitions, 2334 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:21:48,874 INFO L231 Difference]: Finished difference. Result has 226 places, 183 transitions, 1955 flow [2024-06-04 16:21:48,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1955, PETRI_PLACES=226, PETRI_TRANSITIONS=183} [2024-06-04 16:21:48,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-04 16:21:48,875 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 183 transitions, 1955 flow [2024-06-04 16:21:48,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:48,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:48,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:48,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 16:21:48,875 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:48,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:48,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1664576975, now seen corresponding path program 31 times [2024-06-04 16:21:48,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:48,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843122330] [2024-06-04 16:21:48,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:48,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:49,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:49,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843122330] [2024-06-04 16:21:49,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843122330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:49,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:49,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:21:49,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264193834] [2024-06-04 16:21:49,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:49,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:21:49,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:21:49,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:21:49,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:49,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 183 transitions, 1955 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:49,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:49,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:49,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:49,800 INFO L124 PetriNetUnfolderBase]: 2190/3864 cut-off events. [2024-06-04 16:21:49,801 INFO L125 PetriNetUnfolderBase]: For 471386/471386 co-relation queries the response was YES. [2024-06-04 16:21:49,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29278 conditions, 3864 events. 2190/3864 cut-off events. For 471386/471386 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26281 event pairs, 919 based on Foata normal form. 24/3879 useless extension candidates. Maximal degree in co-relation 29174. Up to 3208 conditions per place. [2024-06-04 16:21:49,834 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 110 selfloop transitions, 74 changer transitions 21/212 dead transitions. [2024-06-04 16:21:49,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 212 transitions, 2505 flow [2024-06-04 16:21:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-04 16:21:49,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-04 16:21:49,835 INFO L175 Difference]: Start difference. First operand has 226 places, 183 transitions, 1955 flow. Second operand 9 states and 206 transitions. [2024-06-04 16:21:49,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 212 transitions, 2505 flow [2024-06-04 16:21:50,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 212 transitions, 2345 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:21:50,947 INFO L231 Difference]: Finished difference. Result has 224 places, 178 transitions, 1895 flow [2024-06-04 16:21:50,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1895, PETRI_PLACES=224, PETRI_TRANSITIONS=178} [2024-06-04 16:21:50,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-04 16:21:50,948 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 178 transitions, 1895 flow [2024-06-04 16:21:50,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:50,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:50,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:50,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 16:21:50,948 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:50,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:50,949 INFO L85 PathProgramCache]: Analyzing trace with hash 104197007, now seen corresponding path program 32 times [2024-06-04 16:21:50,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:50,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109935074] [2024-06-04 16:21:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:50,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:51,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:51,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109935074] [2024-06-04 16:21:51,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109935074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:51,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:51,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:21:51,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687223853] [2024-06-04 16:21:51,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:51,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:21:51,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:21:51,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:21:51,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:51,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 178 transitions, 1895 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:51,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:51,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:51,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:51,884 INFO L124 PetriNetUnfolderBase]: 2279/3987 cut-off events. [2024-06-04 16:21:51,884 INFO L125 PetriNetUnfolderBase]: For 516440/516440 co-relation queries the response was YES. [2024-06-04 16:21:51,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31415 conditions, 3987 events. 2279/3987 cut-off events. For 516440/516440 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27122 event pairs, 982 based on Foata normal form. 24/4002 useless extension candidates. Maximal degree in co-relation 31312. Up to 3148 conditions per place. [2024-06-04 16:21:51,919 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 122 selfloop transitions, 68 changer transitions 10/207 dead transitions. [2024-06-04 16:21:51,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 207 transitions, 2581 flow [2024-06-04 16:21:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:51,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 16:21:51,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-04 16:21:51,920 INFO L175 Difference]: Start difference. First operand has 224 places, 178 transitions, 1895 flow. Second operand 9 states and 208 transitions. [2024-06-04 16:21:51,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 207 transitions, 2581 flow [2024-06-04 16:21:53,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 207 transitions, 2413 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 16:21:53,094 INFO L231 Difference]: Finished difference. Result has 219 places, 175 transitions, 1843 flow [2024-06-04 16:21:53,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1843, PETRI_PLACES=219, PETRI_TRANSITIONS=175} [2024-06-04 16:21:53,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-04 16:21:53,094 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 175 transitions, 1843 flow [2024-06-04 16:21:53,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:53,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:53,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:53,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 16:21:53,095 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:53,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:53,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2099235407, now seen corresponding path program 33 times [2024-06-04 16:21:53,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:53,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206171298] [2024-06-04 16:21:53,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:53,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:53,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:53,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206171298] [2024-06-04 16:21:53,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206171298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:53,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:53,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:21:53,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414900844] [2024-06-04 16:21:53,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:53,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:21:53,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:53,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:21:53,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:21:53,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:53,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 175 transitions, 1843 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:53,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:53,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:53,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:54,036 INFO L124 PetriNetUnfolderBase]: 2341/4105 cut-off events. [2024-06-04 16:21:54,037 INFO L125 PetriNetUnfolderBase]: For 526214/526214 co-relation queries the response was YES. [2024-06-04 16:21:54,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32947 conditions, 4105 events. 2341/4105 cut-off events. For 526214/526214 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28070 event pairs, 988 based on Foata normal form. 18/4114 useless extension candidates. Maximal degree in co-relation 32846. Up to 3022 conditions per place. [2024-06-04 16:21:54,073 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 127 selfloop transitions, 68 changer transitions 8/210 dead transitions. [2024-06-04 16:21:54,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 210 transitions, 2701 flow [2024-06-04 16:21:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:21:54,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 16:21:54,074 INFO L175 Difference]: Start difference. First operand has 219 places, 175 transitions, 1843 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:21:54,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 210 transitions, 2701 flow [2024-06-04 16:21:55,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 210 transitions, 2559 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:21:55,417 INFO L231 Difference]: Finished difference. Result has 218 places, 173 transitions, 1829 flow [2024-06-04 16:21:55,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1829, PETRI_PLACES=218, PETRI_TRANSITIONS=173} [2024-06-04 16:21:55,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-04 16:21:55,418 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 173 transitions, 1829 flow [2024-06-04 16:21:55,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:55,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:55,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:55,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 16:21:55,419 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:55,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:55,419 INFO L85 PathProgramCache]: Analyzing trace with hash 311206637, now seen corresponding path program 34 times [2024-06-04 16:21:55,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:55,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550465712] [2024-06-04 16:21:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:55,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:55,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:55,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550465712] [2024-06-04 16:21:55,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550465712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:55,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:55,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:21:55,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694784527] [2024-06-04 16:21:55,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:55,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:21:55,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:55,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:21:55,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:21:55,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:55,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 173 transitions, 1829 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:55,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:55,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:55,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:56,400 INFO L124 PetriNetUnfolderBase]: 2317/4059 cut-off events. [2024-06-04 16:21:56,400 INFO L125 PetriNetUnfolderBase]: For 511692/511692 co-relation queries the response was YES. [2024-06-04 16:21:56,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32592 conditions, 4059 events. 2317/4059 cut-off events. For 511692/511692 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 27639 event pairs, 1054 based on Foata normal form. 18/4068 useless extension candidates. Maximal degree in co-relation 32492. Up to 3022 conditions per place. [2024-06-04 16:21:56,437 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 119 selfloop transitions, 65 changer transitions 13/204 dead transitions. [2024-06-04 16:21:56,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 204 transitions, 2505 flow [2024-06-04 16:21:56,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-04 16:21:56,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-04 16:21:56,438 INFO L175 Difference]: Start difference. First operand has 218 places, 173 transitions, 1829 flow. Second operand 9 states and 209 transitions. [2024-06-04 16:21:56,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 204 transitions, 2505 flow [2024-06-04 16:21:57,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 204 transitions, 2363 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:21:57,760 INFO L231 Difference]: Finished difference. Result has 217 places, 170 transitions, 1793 flow [2024-06-04 16:21:57,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1793, PETRI_PLACES=217, PETRI_TRANSITIONS=170} [2024-06-04 16:21:57,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-04 16:21:57,761 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 170 transitions, 1793 flow [2024-06-04 16:21:57,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:57,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:57,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:57,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 16:21:57,761 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:57,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:57,762 INFO L85 PathProgramCache]: Analyzing trace with hash -536814701, now seen corresponding path program 35 times [2024-06-04 16:21:57,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:57,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698665302] [2024-06-04 16:21:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:57,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:58,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:58,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698665302] [2024-06-04 16:21:58,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698665302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:58,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:58,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:21:58,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979774051] [2024-06-04 16:21:58,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:58,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:21:58,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:21:58,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:21:58,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:21:58,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 170 transitions, 1793 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:58,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:58,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:21:58,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:58,699 INFO L124 PetriNetUnfolderBase]: 2319/4051 cut-off events. [2024-06-04 16:21:58,699 INFO L125 PetriNetUnfolderBase]: For 512174/512174 co-relation queries the response was YES. [2024-06-04 16:21:58,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32417 conditions, 4051 events. 2319/4051 cut-off events. For 512174/512174 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 27622 event pairs, 1090 based on Foata normal form. 26/4068 useless extension candidates. Maximal degree in co-relation 32318. Up to 3467 conditions per place. [2024-06-04 16:21:58,735 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 109 selfloop transitions, 63 changer transitions 13/192 dead transitions. [2024-06-04 16:21:58,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 192 transitions, 2257 flow [2024-06-04 16:21:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-04 16:21:58,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-04 16:21:58,736 INFO L175 Difference]: Start difference. First operand has 217 places, 170 transitions, 1793 flow. Second operand 9 states and 203 transitions. [2024-06-04 16:21:58,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 192 transitions, 2257 flow [2024-06-04 16:21:59,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 192 transitions, 2129 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:21:59,812 INFO L231 Difference]: Finished difference. Result has 214 places, 165 transitions, 1752 flow [2024-06-04 16:21:59,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1752, PETRI_PLACES=214, PETRI_TRANSITIONS=165} [2024-06-04 16:21:59,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-04 16:21:59,813 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 165 transitions, 1752 flow [2024-06-04 16:21:59,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:59,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:59,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:59,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 16:21:59,813 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:59,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1652968685, now seen corresponding path program 36 times [2024-06-04 16:21:59,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:59,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327511410] [2024-06-04 16:21:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:59,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:00,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:00,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327511410] [2024-06-04 16:22:00,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327511410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:00,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:00,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:00,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852958739] [2024-06-04 16:22:00,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:00,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:00,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:00,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:00,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:00,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:00,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 165 transitions, 1752 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:00,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:00,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:00,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:00,733 INFO L124 PetriNetUnfolderBase]: 2189/3837 cut-off events. [2024-06-04 16:22:00,733 INFO L125 PetriNetUnfolderBase]: For 432248/432248 co-relation queries the response was YES. [2024-06-04 16:22:00,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29545 conditions, 3837 events. 2189/3837 cut-off events. For 432248/432248 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25869 event pairs, 966 based on Foata normal form. 24/3852 useless extension candidates. Maximal degree in co-relation 29448. Up to 3022 conditions per place. [2024-06-04 16:22:00,767 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 116 selfloop transitions, 61 changer transitions 10/194 dead transitions. [2024-06-04 16:22:00,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 194 transitions, 2400 flow [2024-06-04 16:22:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-04 16:22:00,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-04 16:22:00,768 INFO L175 Difference]: Start difference. First operand has 214 places, 165 transitions, 1752 flow. Second operand 9 states and 205 transitions. [2024-06-04 16:22:00,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 194 transitions, 2400 flow [2024-06-04 16:22:01,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 194 transitions, 2262 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-04 16:22:01,814 INFO L231 Difference]: Finished difference. Result has 210 places, 162 transitions, 1713 flow [2024-06-04 16:22:01,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1713, PETRI_PLACES=210, PETRI_TRANSITIONS=162} [2024-06-04 16:22:01,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-04 16:22:01,814 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 162 transitions, 1713 flow [2024-06-04 16:22:01,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:01,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:01,814 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, 1, 1] [2024-06-04 16:22:01,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 16:22:01,815 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:01,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:01,815 INFO L85 PathProgramCache]: Analyzing trace with hash -868580543, now seen corresponding path program 37 times [2024-06-04 16:22:01,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:01,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740538136] [2024-06-04 16:22:01,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:01,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:02,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:02,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740538136] [2024-06-04 16:22:02,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740538136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:02,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:02,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:02,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155676542] [2024-06-04 16:22:02,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:02,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:02,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:02,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:02,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:02,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:02,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 162 transitions, 1713 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:02,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:02,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:02,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:02,686 INFO L124 PetriNetUnfolderBase]: 2038/3580 cut-off events. [2024-06-04 16:22:02,686 INFO L125 PetriNetUnfolderBase]: For 363316/363316 co-relation queries the response was YES. [2024-06-04 16:22:02,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26447 conditions, 3580 events. 2038/3580 cut-off events. For 363316/363316 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23889 event pairs, 921 based on Foata normal form. 26/3597 useless extension candidates. Maximal degree in co-relation 26352. Up to 3022 conditions per place. [2024-06-04 16:22:02,716 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 102 selfloop transitions, 55 changer transitions 20/184 dead transitions. [2024-06-04 16:22:02,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 184 transitions, 2161 flow [2024-06-04 16:22:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-04 16:22:02,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-04 16:22:02,717 INFO L175 Difference]: Start difference. First operand has 210 places, 162 transitions, 1713 flow. Second operand 9 states and 197 transitions. [2024-06-04 16:22:02,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 184 transitions, 2161 flow [2024-06-04 16:22:03,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 184 transitions, 2038 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:03,694 INFO L231 Difference]: Finished difference. Result has 208 places, 155 transitions, 1638 flow [2024-06-04 16:22:03,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1638, PETRI_PLACES=208, PETRI_TRANSITIONS=155} [2024-06-04 16:22:03,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-04 16:22:03,694 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 155 transitions, 1638 flow [2024-06-04 16:22:03,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:03,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:03,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:03,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 16:22:03,695 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:03,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:03,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1452131475, now seen corresponding path program 38 times [2024-06-04 16:22:03,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:03,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041252145] [2024-06-04 16:22:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:03,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:03,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:03,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041252145] [2024-06-04 16:22:03,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041252145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:03,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:03,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:03,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487722827] [2024-06-04 16:22:03,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:03,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:03,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:03,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:04,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:04,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 155 transitions, 1638 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:04,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:04,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:04,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:04,595 INFO L124 PetriNetUnfolderBase]: 2351/4127 cut-off events. [2024-06-04 16:22:04,595 INFO L125 PetriNetUnfolderBase]: For 466593/466593 co-relation queries the response was YES. [2024-06-04 16:22:04,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32732 conditions, 4127 events. 2351/4127 cut-off events. For 466593/466593 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 28584 event pairs, 867 based on Foata normal form. 18/4143 useless extension candidates. Maximal degree in co-relation 32638. Up to 1837 conditions per place. [2024-06-04 16:22:04,632 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 137 selfloop transitions, 45 changer transitions 7/196 dead transitions. [2024-06-04 16:22:04,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 196 transitions, 2484 flow [2024-06-04 16:22:04,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:22:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:22:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 16:22:04,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-04 16:22:04,633 INFO L175 Difference]: Start difference. First operand has 208 places, 155 transitions, 1638 flow. Second operand 8 states and 199 transitions. [2024-06-04 16:22:04,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 196 transitions, 2484 flow [2024-06-04 16:22:05,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 196 transitions, 2342 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-04 16:22:05,751 INFO L231 Difference]: Finished difference. Result has 196 places, 154 transitions, 1598 flow [2024-06-04 16:22:05,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1598, PETRI_PLACES=196, PETRI_TRANSITIONS=154} [2024-06-04 16:22:05,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-04 16:22:05,752 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 154 transitions, 1598 flow [2024-06-04 16:22:05,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:05,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:05,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:05,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 16:22:05,753 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:05,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:05,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1949482053, now seen corresponding path program 39 times [2024-06-04 16:22:05,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:05,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232947329] [2024-06-04 16:22:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:05,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:06,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:06,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232947329] [2024-06-04 16:22:06,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232947329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:06,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:06,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:06,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874189803] [2024-06-04 16:22:06,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:06,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:06,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:06,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:06,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:06,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:06,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 154 transitions, 1598 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:06,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:06,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:06,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:06,730 INFO L124 PetriNetUnfolderBase]: 2339/4115 cut-off events. [2024-06-04 16:22:06,731 INFO L125 PetriNetUnfolderBase]: For 422817/422817 co-relation queries the response was YES. [2024-06-04 16:22:06,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32032 conditions, 4115 events. 2339/4115 cut-off events. For 422817/422817 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 28572 event pairs, 867 based on Foata normal form. 18/4131 useless extension candidates. Maximal degree in co-relation 31942. Up to 1837 conditions per place. [2024-06-04 16:22:06,765 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 132 selfloop transitions, 40 changer transitions 12/191 dead transitions. [2024-06-04 16:22:06,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 191 transitions, 2396 flow [2024-06-04 16:22:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:22:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:22:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:22:06,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:22:06,766 INFO L175 Difference]: Start difference. First operand has 196 places, 154 transitions, 1598 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:22:06,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 191 transitions, 2396 flow [2024-06-04 16:22:07,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 191 transitions, 2269 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:07,774 INFO L231 Difference]: Finished difference. Result has 195 places, 152 transitions, 1546 flow [2024-06-04 16:22:07,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1546, PETRI_PLACES=195, PETRI_TRANSITIONS=152} [2024-06-04 16:22:07,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-04 16:22:07,775 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 152 transitions, 1546 flow [2024-06-04 16:22:07,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:07,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:07,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:07,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-04 16:22:07,776 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:07,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1961446503, now seen corresponding path program 40 times [2024-06-04 16:22:07,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:07,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637857102] [2024-06-04 16:22:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:07,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:08,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:08,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637857102] [2024-06-04 16:22:08,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637857102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:08,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:08,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:08,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251855085] [2024-06-04 16:22:08,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:08,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:08,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:08,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:08,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:08,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:08,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 152 transitions, 1546 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:08,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:08,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:08,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:08,668 INFO L124 PetriNetUnfolderBase]: 2315/4063 cut-off events. [2024-06-04 16:22:08,668 INFO L125 PetriNetUnfolderBase]: For 415744/415744 co-relation queries the response was YES. [2024-06-04 16:22:08,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31118 conditions, 4063 events. 2315/4063 cut-off events. For 415744/415744 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 27871 event pairs, 930 based on Foata normal form. 18/4079 useless extension candidates. Maximal degree in co-relation 31029. Up to 3449 conditions per place. [2024-06-04 16:22:08,702 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 141 selfloop transitions, 17 changer transitions 17/182 dead transitions. [2024-06-04 16:22:08,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 182 transitions, 2044 flow [2024-06-04 16:22:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:22:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:22:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-04 16:22:08,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-04 16:22:08,703 INFO L175 Difference]: Start difference. First operand has 195 places, 152 transitions, 1546 flow. Second operand 8 states and 181 transitions. [2024-06-04 16:22:08,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 182 transitions, 2044 flow [2024-06-04 16:22:09,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 182 transitions, 1960 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:22:09,624 INFO L231 Difference]: Finished difference. Result has 193 places, 149 transitions, 1470 flow [2024-06-04 16:22:09,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1470, PETRI_PLACES=193, PETRI_TRANSITIONS=149} [2024-06-04 16:22:09,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-04 16:22:09,624 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 149 transitions, 1470 flow [2024-06-04 16:22:09,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:09,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:09,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:09,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-04 16:22:09,625 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:09,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:09,625 INFO L85 PathProgramCache]: Analyzing trace with hash -80569073, now seen corresponding path program 41 times [2024-06-04 16:22:09,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:09,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027236775] [2024-06-04 16:22:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:09,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:09,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027236775] [2024-06-04 16:22:09,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027236775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:09,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:09,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:09,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5287793] [2024-06-04 16:22:09,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:09,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:09,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:09,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:09,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 149 transitions, 1470 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:09,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:09,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:09,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:10,524 INFO L124 PetriNetUnfolderBase]: 1997/3517 cut-off events. [2024-06-04 16:22:10,524 INFO L125 PetriNetUnfolderBase]: For 320556/320556 co-relation queries the response was YES. [2024-06-04 16:22:10,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25515 conditions, 3517 events. 1997/3517 cut-off events. For 320556/320556 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23582 event pairs, 738 based on Foata normal form. 18/3533 useless extension candidates. Maximal degree in co-relation 25427. Up to 1577 conditions per place. [2024-06-04 16:22:10,548 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 101 selfloop transitions, 70 changer transitions 16/194 dead transitions. [2024-06-04 16:22:10,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 194 transitions, 2304 flow [2024-06-04 16:22:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:22:10,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-04 16:22:10,550 INFO L175 Difference]: Start difference. First operand has 193 places, 149 transitions, 1470 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:22:10,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 194 transitions, 2304 flow [2024-06-04 16:22:11,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 194 transitions, 2258 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:22:11,365 INFO L231 Difference]: Finished difference. Result has 191 places, 146 transitions, 1547 flow [2024-06-04 16:22:11,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1547, PETRI_PLACES=191, PETRI_TRANSITIONS=146} [2024-06-04 16:22:11,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-04 16:22:11,365 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 146 transitions, 1547 flow [2024-06-04 16:22:11,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:11,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:11,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:11,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-04 16:22:11,366 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:11,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash -70449743, now seen corresponding path program 42 times [2024-06-04 16:22:11,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:11,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676136880] [2024-06-04 16:22:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:11,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:11,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:11,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676136880] [2024-06-04 16:22:11,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676136880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:11,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:11,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:11,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548154141] [2024-06-04 16:22:11,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:11,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:11,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:11,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:11,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:11,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:11,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 146 transitions, 1547 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:11,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:11,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:11,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:12,171 INFO L124 PetriNetUnfolderBase]: 1995/3513 cut-off events. [2024-06-04 16:22:12,171 INFO L125 PetriNetUnfolderBase]: For 335525/335525 co-relation queries the response was YES. [2024-06-04 16:22:12,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26480 conditions, 3513 events. 1995/3513 cut-off events. For 335525/335525 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 23617 event pairs, 714 based on Foata normal form. 18/3529 useless extension candidates. Maximal degree in co-relation 26393. Up to 1577 conditions per place. [2024-06-04 16:22:12,201 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 114 selfloop transitions, 61 changer transitions 8/190 dead transitions. [2024-06-04 16:22:12,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 190 transitions, 2471 flow [2024-06-04 16:22:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-04 16:22:12,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:22:12,202 INFO L175 Difference]: Start difference. First operand has 191 places, 146 transitions, 1547 flow. Second operand 9 states and 216 transitions. [2024-06-04 16:22:12,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 190 transitions, 2471 flow [2024-06-04 16:22:12,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 190 transitions, 2314 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:12,880 INFO L231 Difference]: Finished difference. Result has 188 places, 144 transitions, 1517 flow [2024-06-04 16:22:12,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1517, PETRI_PLACES=188, PETRI_TRANSITIONS=144} [2024-06-04 16:22:12,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-04 16:22:12,880 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 144 transitions, 1517 flow [2024-06-04 16:22:12,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:12,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:12,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:12,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-04 16:22:12,881 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:12,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:12,881 INFO L85 PathProgramCache]: Analyzing trace with hash 193630219, now seen corresponding path program 43 times [2024-06-04 16:22:12,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:12,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938562203] [2024-06-04 16:22:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:12,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:13,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:13,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938562203] [2024-06-04 16:22:13,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938562203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:13,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:13,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:13,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34476887] [2024-06-04 16:22:13,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:13,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:13,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:13,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:13,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:13,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 144 transitions, 1517 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:13,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:13,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:13,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:13,663 INFO L124 PetriNetUnfolderBase]: 1890/3326 cut-off events. [2024-06-04 16:22:13,663 INFO L125 PetriNetUnfolderBase]: For 287939/287939 co-relation queries the response was YES. [2024-06-04 16:22:13,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24492 conditions, 3326 events. 1890/3326 cut-off events. For 287939/287939 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22098 event pairs, 702 based on Foata normal form. 18/3342 useless extension candidates. Maximal degree in co-relation 24407. Up to 1577 conditions per place. [2024-06-04 16:22:13,690 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 58 changer transitions 19/183 dead transitions. [2024-06-04 16:22:13,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 183 transitions, 2277 flow [2024-06-04 16:22:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:13,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-04 16:22:13,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-04 16:22:13,691 INFO L175 Difference]: Start difference. First operand has 188 places, 144 transitions, 1517 flow. Second operand 9 states and 210 transitions. [2024-06-04 16:22:13,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 183 transitions, 2277 flow [2024-06-04 16:22:14,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 183 transitions, 2130 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-04 16:22:14,254 INFO L231 Difference]: Finished difference. Result has 186 places, 140 transitions, 1466 flow [2024-06-04 16:22:14,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1466, PETRI_PLACES=186, PETRI_TRANSITIONS=140} [2024-06-04 16:22:14,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-04 16:22:14,255 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 140 transitions, 1466 flow [2024-06-04 16:22:14,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:14,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:14,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:14,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-04 16:22:14,255 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:14,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:14,256 INFO L85 PathProgramCache]: Analyzing trace with hash -411112629, now seen corresponding path program 44 times [2024-06-04 16:22:14,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:14,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795809615] [2024-06-04 16:22:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:14,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:14,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:14,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795809615] [2024-06-04 16:22:14,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795809615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:14,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:14,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:14,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815079786] [2024-06-04 16:22:14,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:14,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:14,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:14,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:14,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:14,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 140 transitions, 1466 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:14,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:14,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:14,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:15,129 INFO L124 PetriNetUnfolderBase]: 1845/3217 cut-off events. [2024-06-04 16:22:15,129 INFO L125 PetriNetUnfolderBase]: For 267457/267457 co-relation queries the response was YES. [2024-06-04 16:22:15,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23482 conditions, 3217 events. 1845/3217 cut-off events. For 267457/267457 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21093 event pairs, 737 based on Foata normal form. 18/3231 useless extension candidates. Maximal degree in co-relation 23399. Up to 2615 conditions per place. [2024-06-04 16:22:15,156 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 121 selfloop transitions, 24 changer transitions 17/169 dead transitions. [2024-06-04 16:22:15,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 169 transitions, 1932 flow [2024-06-04 16:22:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:15,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-04 16:22:15,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-04 16:22:15,157 INFO L175 Difference]: Start difference. First operand has 186 places, 140 transitions, 1466 flow. Second operand 9 states and 195 transitions. [2024-06-04 16:22:15,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 169 transitions, 1932 flow [2024-06-04 16:22:15,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 169 transitions, 1795 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:15,666 INFO L231 Difference]: Finished difference. Result has 180 places, 137 transitions, 1352 flow [2024-06-04 16:22:15,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1352, PETRI_PLACES=180, PETRI_TRANSITIONS=137} [2024-06-04 16:22:15,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-04 16:22:15,666 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 137 transitions, 1352 flow [2024-06-04 16:22:15,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:15,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:15,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:15,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-04 16:22:15,667 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:15,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:15,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1074271503, now seen corresponding path program 45 times [2024-06-04 16:22:15,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:15,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399374887] [2024-06-04 16:22:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:15,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:15,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:15,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399374887] [2024-06-04 16:22:15,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399374887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:15,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:15,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:15,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856662847] [2024-06-04 16:22:15,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:15,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:15,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:16,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:16,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 137 transitions, 1352 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:16,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:16,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:16,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:16,476 INFO L124 PetriNetUnfolderBase]: 1882/3278 cut-off events. [2024-06-04 16:22:16,476 INFO L125 PetriNetUnfolderBase]: For 266695/266695 co-relation queries the response was YES. [2024-06-04 16:22:16,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24017 conditions, 3278 events. 1882/3278 cut-off events. For 266695/266695 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21732 event pairs, 854 based on Foata normal form. 18/3294 useless extension candidates. Maximal degree in co-relation 23937. Up to 2035 conditions per place. [2024-06-04 16:22:16,501 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 103 selfloop transitions, 54 changer transitions 8/172 dead transitions. [2024-06-04 16:22:16,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 172 transitions, 2040 flow [2024-06-04 16:22:16,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-04 16:22:16,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-04 16:22:16,502 INFO L175 Difference]: Start difference. First operand has 180 places, 137 transitions, 1352 flow. Second operand 9 states and 205 transitions. [2024-06-04 16:22:16,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 172 transitions, 2040 flow [2024-06-04 16:22:16,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 172 transitions, 1974 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:16,884 INFO L231 Difference]: Finished difference. Result has 176 places, 135 transitions, 1392 flow [2024-06-04 16:22:16,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1392, PETRI_PLACES=176, PETRI_TRANSITIONS=135} [2024-06-04 16:22:16,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-04 16:22:16,886 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 135 transitions, 1392 flow [2024-06-04 16:22:16,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:16,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:16,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:16,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-04 16:22:16,887 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:16,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:16,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1073915313, now seen corresponding path program 46 times [2024-06-04 16:22:16,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:16,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799309855] [2024-06-04 16:22:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:16,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:17,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:17,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799309855] [2024-06-04 16:22:17,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799309855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:17,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:17,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:17,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253572173] [2024-06-04 16:22:17,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:17,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:17,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:17,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:17,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:17,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:17,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 135 transitions, 1392 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:17,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:17,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:17,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:17,656 INFO L124 PetriNetUnfolderBase]: 1777/3091 cut-off events. [2024-06-04 16:22:17,656 INFO L125 PetriNetUnfolderBase]: For 226955/226955 co-relation queries the response was YES. [2024-06-04 16:22:17,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22131 conditions, 3091 events. 1777/3091 cut-off events. For 226955/226955 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20213 event pairs, 842 based on Foata normal form. 18/3107 useless extension candidates. Maximal degree in co-relation 22053. Up to 2035 conditions per place. [2024-06-04 16:22:17,679 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 86 selfloop transitions, 50 changer transitions 22/165 dead transitions. [2024-06-04 16:22:17,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 165 transitions, 1934 flow [2024-06-04 16:22:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 16:22:17,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-04 16:22:17,680 INFO L175 Difference]: Start difference. First operand has 176 places, 135 transitions, 1392 flow. Second operand 9 states and 199 transitions. [2024-06-04 16:22:17,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 165 transitions, 1934 flow [2024-06-04 16:22:18,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 165 transitions, 1819 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:18,002 INFO L231 Difference]: Finished difference. Result has 175 places, 130 transitions, 1334 flow [2024-06-04 16:22:18,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1334, PETRI_PLACES=175, PETRI_TRANSITIONS=130} [2024-06-04 16:22:18,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-04 16:22:18,003 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 130 transitions, 1334 flow [2024-06-04 16:22:18,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:18,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:18,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:18,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-04 16:22:18,003 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:18,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:18,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1249023483, now seen corresponding path program 47 times [2024-06-04 16:22:18,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:18,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163293655] [2024-06-04 16:22:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:18,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:18,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:18,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163293655] [2024-06-04 16:22:18,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163293655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:18,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:18,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:18,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088388966] [2024-06-04 16:22:18,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:18,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:18,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:18,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:18,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:18,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 130 transitions, 1334 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:18,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:18,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:18,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:18,805 INFO L124 PetriNetUnfolderBase]: 1882/3278 cut-off events. [2024-06-04 16:22:18,805 INFO L125 PetriNetUnfolderBase]: For 249596/249596 co-relation queries the response was YES. [2024-06-04 16:22:18,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23801 conditions, 3278 events. 1882/3278 cut-off events. For 249596/249596 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21808 event pairs, 917 based on Foata normal form. 24/3300 useless extension candidates. Maximal degree in co-relation 23724. Up to 2607 conditions per place. [2024-06-04 16:22:18,831 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 119 selfloop transitions, 16 changer transitions 10/152 dead transitions. [2024-06-04 16:22:18,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 152 transitions, 1834 flow [2024-06-04 16:22:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:22:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:22:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-04 16:22:18,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-04 16:22:18,832 INFO L175 Difference]: Start difference. First operand has 175 places, 130 transitions, 1334 flow. Second operand 8 states and 175 transitions. [2024-06-04 16:22:18,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 152 transitions, 1834 flow [2024-06-04 16:22:19,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 152 transitions, 1755 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:19,119 INFO L231 Difference]: Finished difference. Result has 166 places, 127 transitions, 1240 flow [2024-06-04 16:22:19,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=158, 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=8, PETRI_FLOW=1240, PETRI_PLACES=166, PETRI_TRANSITIONS=127} [2024-06-04 16:22:19,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-04 16:22:19,119 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 127 transitions, 1240 flow [2024-06-04 16:22:19,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:19,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:19,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:19,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-04 16:22:19,120 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:19,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1393127583, now seen corresponding path program 48 times [2024-06-04 16:22:19,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:19,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306604968] [2024-06-04 16:22:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:19,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:19,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:19,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306604968] [2024-06-04 16:22:19,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306604968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:19,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:19,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:19,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283360010] [2024-06-04 16:22:19,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:19,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:19,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:19,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:19,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:19,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 127 transitions, 1240 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:19,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:19,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:19,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:19,900 INFO L124 PetriNetUnfolderBase]: 1731/3021 cut-off events. [2024-06-04 16:22:19,901 INFO L125 PetriNetUnfolderBase]: For 197392/197392 co-relation queries the response was YES. [2024-06-04 16:22:19,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20931 conditions, 3021 events. 1731/3021 cut-off events. For 197392/197392 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 19819 event pairs, 872 based on Foata normal form. 26/3045 useless extension candidates. Maximal degree in co-relation 20858. Up to 2607 conditions per place. [2024-06-04 16:22:19,923 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 109 selfloop transitions, 12 changer transitions 14/142 dead transitions. [2024-06-04 16:22:19,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 142 transitions, 1580 flow [2024-06-04 16:22:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:22:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:22:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-04 16:22:19,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-04 16:22:19,924 INFO L175 Difference]: Start difference. First operand has 166 places, 127 transitions, 1240 flow. Second operand 8 states and 167 transitions. [2024-06-04 16:22:19,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 142 transitions, 1580 flow [2024-06-04 16:22:20,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 142 transitions, 1547 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:22:20,196 INFO L231 Difference]: Finished difference. Result has 166 places, 122 transitions, 1182 flow [2024-06-04 16:22:20,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1182, PETRI_PLACES=166, PETRI_TRANSITIONS=122} [2024-06-04 16:22:20,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-04 16:22:20,196 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 122 transitions, 1182 flow [2024-06-04 16:22:20,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:20,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:20,197 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, 1, 1] [2024-06-04 16:22:20,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-04 16:22:20,197 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:20,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:20,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1046474911, now seen corresponding path program 49 times [2024-06-04 16:22:20,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:20,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276876817] [2024-06-04 16:22:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:20,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:20,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:20,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276876817] [2024-06-04 16:22:20,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276876817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:20,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:20,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:20,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698025787] [2024-06-04 16:22:20,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:20,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:20,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:20,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:20,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:20,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:20,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 122 transitions, 1182 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:20,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:20,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:20,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:20,956 INFO L124 PetriNetUnfolderBase]: 1715/3009 cut-off events. [2024-06-04 16:22:20,956 INFO L125 PetriNetUnfolderBase]: For 194956/194956 co-relation queries the response was YES. [2024-06-04 16:22:20,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20765 conditions, 3009 events. 1715/3009 cut-off events. For 194956/194956 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19860 event pairs, 820 based on Foata normal form. 24/3031 useless extension candidates. Maximal degree in co-relation 20692. Up to 2515 conditions per place. [2024-06-04 16:22:20,978 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 106 selfloop transitions, 9 changer transitions 23/145 dead transitions. [2024-06-04 16:22:20,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 145 transitions, 1600 flow [2024-06-04 16:22:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:22:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:22:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-04 16:22:20,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:22:20,979 INFO L175 Difference]: Start difference. First operand has 166 places, 122 transitions, 1182 flow. Second operand 8 states and 172 transitions. [2024-06-04 16:22:20,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 145 transitions, 1600 flow [2024-06-04 16:22:21,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 145 transitions, 1562 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 16:22:21,266 INFO L231 Difference]: Finished difference. Result has 161 places, 117 transitions, 1095 flow [2024-06-04 16:22:21,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1095, PETRI_PLACES=161, PETRI_TRANSITIONS=117} [2024-06-04 16:22:21,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-04 16:22:21,266 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 117 transitions, 1095 flow [2024-06-04 16:22:21,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:21,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:21,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:21,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-04 16:22:21,267 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:21,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:21,267 INFO L85 PathProgramCache]: Analyzing trace with hash 374657299, now seen corresponding path program 50 times [2024-06-04 16:22:21,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:21,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192953054] [2024-06-04 16:22:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:21,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:21,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:21,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192953054] [2024-06-04 16:22:21,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192953054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:21,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:21,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:21,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903661058] [2024-06-04 16:22:21,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:21,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:21,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:21,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:21,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:21,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:21,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 117 transitions, 1095 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:21,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:21,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:21,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:22,109 INFO L124 PetriNetUnfolderBase]: 1895/3295 cut-off events. [2024-06-04 16:22:22,110 INFO L125 PetriNetUnfolderBase]: For 237756/237756 co-relation queries the response was YES. [2024-06-04 16:22:22,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23797 conditions, 3295 events. 1895/3295 cut-off events. For 237756/237756 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21979 event pairs, 965 based on Foata normal form. 24/3317 useless extension candidates. Maximal degree in co-relation 23726. Up to 2357 conditions per place. [2024-06-04 16:22:22,134 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 104 selfloop transitions, 18 changer transitions 16/145 dead transitions. [2024-06-04 16:22:22,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 145 transitions, 1615 flow [2024-06-04 16:22:22,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:22:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:22:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-04 16:22:22,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-04 16:22:22,135 INFO L175 Difference]: Start difference. First operand has 161 places, 117 transitions, 1095 flow. Second operand 10 states and 213 transitions. [2024-06-04 16:22:22,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 145 transitions, 1615 flow [2024-06-04 16:22:22,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 145 transitions, 1589 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:22:22,427 INFO L231 Difference]: Finished difference. Result has 158 places, 113 transitions, 1063 flow [2024-06-04 16:22:22,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1063, PETRI_PLACES=158, PETRI_TRANSITIONS=113} [2024-06-04 16:22:22,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-04 16:22:22,428 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 113 transitions, 1063 flow [2024-06-04 16:22:22,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:22,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:22,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:22,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-04 16:22:22,429 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:22,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:22,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1043032251, now seen corresponding path program 51 times [2024-06-04 16:22:22,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:22,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492219614] [2024-06-04 16:22:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:22,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:22,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:22,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492219614] [2024-06-04 16:22:22,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492219614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:22,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:22,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:22,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622838683] [2024-06-04 16:22:22,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:22,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:22,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:22,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:22,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:22,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:22,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 113 transitions, 1063 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:22,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:22,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:22,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:23,221 INFO L124 PetriNetUnfolderBase]: 1721/2985 cut-off events. [2024-06-04 16:22:23,221 INFO L125 PetriNetUnfolderBase]: For 216018/216018 co-relation queries the response was YES. [2024-06-04 16:22:23,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21509 conditions, 2985 events. 1721/2985 cut-off events. For 216018/216018 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19516 event pairs, 873 based on Foata normal form. 24/3007 useless extension candidates. Maximal degree in co-relation 21440. Up to 2357 conditions per place. [2024-06-04 16:22:23,244 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 103 selfloop transitions, 16 changer transitions 10/136 dead transitions. [2024-06-04 16:22:23,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 136 transitions, 1527 flow [2024-06-04 16:22:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-04 16:22:23,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-04 16:22:23,246 INFO L175 Difference]: Start difference. First operand has 158 places, 113 transitions, 1063 flow. Second operand 9 states and 190 transitions. [2024-06-04 16:22:23,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 136 transitions, 1527 flow [2024-06-04 16:22:23,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 136 transitions, 1479 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-04 16:22:23,456 INFO L231 Difference]: Finished difference. Result has 154 places, 110 transitions, 1021 flow [2024-06-04 16:22:23,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1021, PETRI_PLACES=154, PETRI_TRANSITIONS=110} [2024-06-04 16:22:23,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-04 16:22:23,457 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 110 transitions, 1021 flow [2024-06-04 16:22:23,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:23,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:23,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:23,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-04 16:22:23,457 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:23,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:23,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1828554003, now seen corresponding path program 52 times [2024-06-04 16:22:23,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:23,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855822476] [2024-06-04 16:22:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:23,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:23,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:23,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855822476] [2024-06-04 16:22:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855822476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:23,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:23,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:23,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865244966] [2024-06-04 16:22:23,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:23,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:23,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 110 transitions, 1021 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:23,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:23,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:23,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:24,309 INFO L124 PetriNetUnfolderBase]: 2072/3582 cut-off events. [2024-06-04 16:22:24,309 INFO L125 PetriNetUnfolderBase]: For 272364/272364 co-relation queries the response was YES. [2024-06-04 16:22:24,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26886 conditions, 3582 events. 2072/3582 cut-off events. For 272364/272364 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 24463 event pairs, 1032 based on Foata normal form. 18/3598 useless extension candidates. Maximal degree in co-relation 26818. Up to 1981 conditions per place. [2024-06-04 16:22:24,334 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 86 selfloop transitions, 43 changer transitions 8/144 dead transitions. [2024-06-04 16:22:24,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 144 transitions, 1715 flow [2024-06-04 16:22:24,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:24,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-04 16:22:24,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:22:24,335 INFO L175 Difference]: Start difference. First operand has 154 places, 110 transitions, 1021 flow. Second operand 9 states and 207 transitions. [2024-06-04 16:22:24,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 144 transitions, 1715 flow [2024-06-04 16:22:24,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 144 transitions, 1670 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:24,632 INFO L231 Difference]: Finished difference. Result has 153 places, 108 transitions, 1060 flow [2024-06-04 16:22:24,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1060, PETRI_PLACES=153, PETRI_TRANSITIONS=108} [2024-06-04 16:22:24,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-04 16:22:24,632 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 108 transitions, 1060 flow [2024-06-04 16:22:24,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:24,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:24,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:24,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-04 16:22:24,633 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:24,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2013657029, now seen corresponding path program 53 times [2024-06-04 16:22:24,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:24,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124861137] [2024-06-04 16:22:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:24,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:24,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:24,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124861137] [2024-06-04 16:22:24,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124861137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:24,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:24,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:24,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262644865] [2024-06-04 16:22:24,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:24,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:24,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:24,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:24,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:25,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:25,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 108 transitions, 1060 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:25,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:25,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:25,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:25,458 INFO L124 PetriNetUnfolderBase]: 1967/3403 cut-off events. [2024-06-04 16:22:25,458 INFO L125 PetriNetUnfolderBase]: For 245440/245440 co-relation queries the response was YES. [2024-06-04 16:22:25,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25299 conditions, 3403 events. 1967/3403 cut-off events. For 245440/245440 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23053 event pairs, 1048 based on Foata normal form. 18/3419 useless extension candidates. Maximal degree in co-relation 25232. Up to 2990 conditions per place. [2024-06-04 16:22:25,486 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 93 selfloop transitions, 13 changer transitions 17/130 dead transitions. [2024-06-04 16:22:25,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 130 transitions, 1404 flow [2024-06-04 16:22:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-04 16:22:25,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-04 16:22:25,487 INFO L175 Difference]: Start difference. First operand has 153 places, 108 transitions, 1060 flow. Second operand 9 states and 187 transitions. [2024-06-04 16:22:25,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 130 transitions, 1404 flow [2024-06-04 16:22:25,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 130 transitions, 1315 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:25,749 INFO L231 Difference]: Finished difference. Result has 152 places, 105 transitions, 972 flow [2024-06-04 16:22:25,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=972, PETRI_PLACES=152, PETRI_TRANSITIONS=105} [2024-06-04 16:22:25,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-04 16:22:25,749 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 105 transitions, 972 flow [2024-06-04 16:22:25,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:25,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:25,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:25,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-04 16:22:25,750 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:25,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1876044367, now seen corresponding path program 54 times [2024-06-04 16:22:25,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:25,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768227303] [2024-06-04 16:22:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:25,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:26,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:26,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768227303] [2024-06-04 16:22:26,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768227303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:26,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:26,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:26,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008198594] [2024-06-04 16:22:26,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:26,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:26,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:26,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:26,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:26,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:26,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 105 transitions, 972 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:26,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:26,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:26,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:26,546 INFO L124 PetriNetUnfolderBase]: 1923/3319 cut-off events. [2024-06-04 16:22:26,546 INFO L125 PetriNetUnfolderBase]: For 232463/232463 co-relation queries the response was YES. [2024-06-04 16:22:26,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24600 conditions, 3319 events. 1923/3319 cut-off events. For 232463/232463 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 22281 event pairs, 1007 based on Foata normal form. 18/3333 useless extension candidates. Maximal degree in co-relation 24534. Up to 2166 conditions per place. [2024-06-04 16:22:26,568 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 75 selfloop transitions, 44 changer transitions 8/134 dead transitions. [2024-06-04 16:22:26,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 134 transitions, 1538 flow [2024-06-04 16:22:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:22:26,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-04 16:22:26,570 INFO L175 Difference]: Start difference. First operand has 152 places, 105 transitions, 972 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:22:26,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 134 transitions, 1538 flow [2024-06-04 16:22:26,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 134 transitions, 1500 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:22:26,776 INFO L231 Difference]: Finished difference. Result has 149 places, 103 transitions, 1018 flow [2024-06-04 16:22:26,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1018, PETRI_PLACES=149, PETRI_TRANSITIONS=103} [2024-06-04 16:22:26,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-04 16:22:26,777 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 103 transitions, 1018 flow [2024-06-04 16:22:26,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:26,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:26,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:26,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-04 16:22:26,778 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)] === [2024-06-04 16:22:26,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:26,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1875688177, now seen corresponding path program 55 times [2024-06-04 16:22:26,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:26,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428318647] [2024-06-04 16:22:26,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:26,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:27,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:27,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428318647] [2024-06-04 16:22:27,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428318647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:27,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:27,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:27,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112165142] [2024-06-04 16:22:27,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:27,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:27,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:27,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:27,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:27,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:27,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 103 transitions, 1018 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:27,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:27,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:27,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:27,605 INFO L124 PetriNetUnfolderBase]: 2013/3475 cut-off events. [2024-06-04 16:22:27,606 INFO L125 PetriNetUnfolderBase]: For 238530/238530 co-relation queries the response was YES. [2024-06-04 16:22:27,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25915 conditions, 3475 events. 2013/3475 cut-off events. For 238530/238530 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 23695 event pairs, 1089 based on Foata normal form. 18/3489 useless extension candidates. Maximal degree in co-relation 25850. Up to 2166 conditions per place. [2024-06-04 16:22:27,631 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 74 selfloop transitions, 42 changer transitions 9/132 dead transitions. [2024-06-04 16:22:27,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 132 transitions, 1576 flow [2024-06-04 16:22:27,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:22:27,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-04 16:22:27,632 INFO L175 Difference]: Start difference. First operand has 149 places, 103 transitions, 1018 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:22:27,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 132 transitions, 1576 flow [2024-06-04 16:22:27,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 132 transitions, 1478 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:27,852 INFO L231 Difference]: Finished difference. Result has 148 places, 100 transitions, 986 flow [2024-06-04 16:22:27,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=986, PETRI_PLACES=148, PETRI_TRANSITIONS=100} [2024-06-04 16:22:27,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-04 16:22:27,853 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 100 transitions, 986 flow [2024-06-04 16:22:27,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:27,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:27,853 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, 1, 1] [2024-06-04 16:22:27,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-04 16:22:27,854 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)] === [2024-06-04 16:22:27,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:27,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1312575399, now seen corresponding path program 56 times [2024-06-04 16:22:27,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:27,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236518187] [2024-06-04 16:22:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:27,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:28,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:28,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236518187] [2024-06-04 16:22:28,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236518187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:28,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:28,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:28,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107425589] [2024-06-04 16:22:28,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:28,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:28,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:28,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:28,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:28,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:28,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 100 transitions, 986 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:28,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:28,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:28,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:28,678 INFO L124 PetriNetUnfolderBase]: 1888/3262 cut-off events. [2024-06-04 16:22:28,678 INFO L125 PetriNetUnfolderBase]: For 214127/214127 co-relation queries the response was YES. [2024-06-04 16:22:28,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23848 conditions, 3262 events. 1888/3262 cut-off events. For 214127/214127 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 22019 event pairs, 1118 based on Foata normal form. 26/3284 useless extension candidates. Maximal degree in co-relation 23784. Up to 2887 conditions per place. [2024-06-04 16:22:28,702 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 11 changer transitions 16/116 dead transitions. [2024-06-04 16:22:28,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 116 transitions, 1276 flow [2024-06-04 16:22:28,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-04 16:22:28,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932249322493225 [2024-06-04 16:22:28,704 INFO L175 Difference]: Start difference. First operand has 148 places, 100 transitions, 986 flow. Second operand 9 states and 182 transitions. [2024-06-04 16:22:28,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 116 transitions, 1276 flow [2024-06-04 16:22:28,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 116 transitions, 1187 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 16:22:28,894 INFO L231 Difference]: Finished difference. Result has 145 places, 94 transitions, 874 flow [2024-06-04 16:22:28,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=874, PETRI_PLACES=145, PETRI_TRANSITIONS=94} [2024-06-04 16:22:28,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-04 16:22:28,894 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 94 transitions, 874 flow [2024-06-04 16:22:28,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:28,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:28,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:28,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-04 16:22:28,895 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)] === [2024-06-04 16:22:28,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:28,895 INFO L85 PathProgramCache]: Analyzing trace with hash 55971249, now seen corresponding path program 57 times [2024-06-04 16:22:28,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:28,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055741355] [2024-06-04 16:22:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:28,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:29,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:29,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055741355] [2024-06-04 16:22:29,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055741355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:29,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:29,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:29,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736716487] [2024-06-04 16:22:29,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:29,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:29,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:29,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:29,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 94 transitions, 874 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:29,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:29,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:29,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:29,622 INFO L124 PetriNetUnfolderBase]: 1770/3050 cut-off events. [2024-06-04 16:22:29,622 INFO L125 PetriNetUnfolderBase]: For 177641/177641 co-relation queries the response was YES. [2024-06-04 16:22:29,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21770 conditions, 3050 events. 1770/3050 cut-off events. For 177641/177641 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 20177 event pairs, 1001 based on Foata normal form. 18/3066 useless extension candidates. Maximal degree in co-relation 21708. Up to 1981 conditions per place. [2024-06-04 16:22:29,644 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 35 changer transitions 16/120 dead transitions. [2024-06-04 16:22:29,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 120 transitions, 1294 flow [2024-06-04 16:22:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-04 16:22:29,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:22:29,646 INFO L175 Difference]: Start difference. First operand has 145 places, 94 transitions, 874 flow. Second operand 9 states and 198 transitions. [2024-06-04 16:22:29,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 120 transitions, 1294 flow [2024-06-04 16:22:29,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 120 transitions, 1260 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:22:29,842 INFO L231 Difference]: Finished difference. Result has 138 places, 90 transitions, 885 flow [2024-06-04 16:22:29,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=885, PETRI_PLACES=138, PETRI_TRANSITIONS=90} [2024-06-04 16:22:29,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-04 16:22:29,843 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 90 transitions, 885 flow [2024-06-04 16:22:29,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:29,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:29,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:29,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-04 16:22:29,843 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)] === [2024-06-04 16:22:29,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:29,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1260613401, now seen corresponding path program 58 times [2024-06-04 16:22:29,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:29,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623893802] [2024-06-04 16:22:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:29,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:30,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:30,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623893802] [2024-06-04 16:22:30,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623893802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:30,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:30,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:30,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776228657] [2024-06-04 16:22:30,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:30,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:30,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:30,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:30,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:30,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:30,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 90 transitions, 885 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:30,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:30,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:30,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:30,583 INFO L124 PetriNetUnfolderBase]: 1768/3036 cut-off events. [2024-06-04 16:22:30,584 INFO L125 PetriNetUnfolderBase]: For 163602/163602 co-relation queries the response was YES. [2024-06-04 16:22:30,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21326 conditions, 3036 events. 1768/3036 cut-off events. For 163602/163602 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 20097 event pairs, 1037 based on Foata normal form. 26/3060 useless extension candidates. Maximal degree in co-relation 21266. Up to 2660 conditions per place. [2024-06-04 16:22:30,605 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 52 selfloop transitions, 35 changer transitions 12/106 dead transitions. [2024-06-04 16:22:30,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 106 transitions, 1155 flow [2024-06-04 16:22:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-04 16:22:30,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-04 16:22:30,607 INFO L175 Difference]: Start difference. First operand has 138 places, 90 transitions, 885 flow. Second operand 9 states and 190 transitions. [2024-06-04 16:22:30,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 106 transitions, 1155 flow [2024-06-04 16:22:30,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 106 transitions, 1087 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:30,740 INFO L231 Difference]: Finished difference. Result has 132 places, 86 transitions, 857 flow [2024-06-04 16:22:30,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=857, PETRI_PLACES=132, PETRI_TRANSITIONS=86} [2024-06-04 16:22:30,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-04 16:22:30,741 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 86 transitions, 857 flow [2024-06-04 16:22:30,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:30,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:30,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:30,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-04 16:22:30,742 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)] === [2024-06-04 16:22:30,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:30,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1733585107, now seen corresponding path program 59 times [2024-06-04 16:22:30,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:30,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773903607] [2024-06-04 16:22:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:30,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:31,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:31,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773903607] [2024-06-04 16:22:31,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773903607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:31,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:31,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:31,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126552438] [2024-06-04 16:22:31,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:31,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:31,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:31,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:31,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:31,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 86 transitions, 857 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:31,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:31,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:31,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:31,472 INFO L124 PetriNetUnfolderBase]: 1639/2827 cut-off events. [2024-06-04 16:22:31,472 INFO L125 PetriNetUnfolderBase]: For 124822/124822 co-relation queries the response was YES. [2024-06-04 16:22:31,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18967 conditions, 2827 events. 1639/2827 cut-off events. For 124822/124822 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18535 event pairs, 913 based on Foata normal form. 24/2849 useless extension candidates. Maximal degree in co-relation 18910. Up to 2215 conditions per place. [2024-06-04 16:22:31,491 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 32 changer transitions 11/109 dead transitions. [2024-06-04 16:22:31,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 109 transitions, 1243 flow [2024-06-04 16:22:31,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-04 16:22:31,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-04 16:22:31,492 INFO L175 Difference]: Start difference. First operand has 132 places, 86 transitions, 857 flow. Second operand 9 states and 194 transitions. [2024-06-04 16:22:31,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 109 transitions, 1243 flow [2024-06-04 16:22:31,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 109 transitions, 1165 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:31,621 INFO L231 Difference]: Finished difference. Result has 130 places, 82 transitions, 808 flow [2024-06-04 16:22:31,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=808, PETRI_PLACES=130, PETRI_TRANSITIONS=82} [2024-06-04 16:22:31,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-04 16:22:31,621 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 82 transitions, 808 flow [2024-06-04 16:22:31,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:31,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:31,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:31,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-04 16:22:31,622 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)] === [2024-06-04 16:22:31,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:31,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2082697807, now seen corresponding path program 60 times [2024-06-04 16:22:31,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:31,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971007562] [2024-06-04 16:22:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:31,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:31,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:31,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971007562] [2024-06-04 16:22:31,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971007562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:31,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:31,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:31,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541439841] [2024-06-04 16:22:31,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:31,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:31,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:31,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:32,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:32,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 82 transitions, 808 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:32,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:32,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:32,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:32,319 INFO L124 PetriNetUnfolderBase]: 1492/2572 cut-off events. [2024-06-04 16:22:32,320 INFO L125 PetriNetUnfolderBase]: For 106272/106272 co-relation queries the response was YES. [2024-06-04 16:22:32,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16978 conditions, 2572 events. 1492/2572 cut-off events. For 106272/106272 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 16464 event pairs, 821 based on Foata normal form. 24/2594 useless extension candidates. Maximal degree in co-relation 16922. Up to 1981 conditions per place. [2024-06-04 16:22:32,336 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 30 changer transitions 10/105 dead transitions. [2024-06-04 16:22:32,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 105 transitions, 1184 flow [2024-06-04 16:22:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-04 16:22:32,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-04 16:22:32,337 INFO L175 Difference]: Start difference. First operand has 130 places, 82 transitions, 808 flow. Second operand 9 states and 191 transitions. [2024-06-04 16:22:32,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 105 transitions, 1184 flow [2024-06-04 16:22:32,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 105 transitions, 1111 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-04 16:22:32,433 INFO L231 Difference]: Finished difference. Result has 126 places, 79 transitions, 772 flow [2024-06-04 16:22:32,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=772, PETRI_PLACES=126, PETRI_TRANSITIONS=79} [2024-06-04 16:22:32,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-04 16:22:32,434 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 79 transitions, 772 flow [2024-06-04 16:22:32,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:32,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:32,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:32,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-04 16:22:32,434 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)] === [2024-06-04 16:22:32,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:32,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1318935283, now seen corresponding path program 61 times [2024-06-04 16:22:32,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:32,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195518427] [2024-06-04 16:22:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:32,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:32,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:32,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195518427] [2024-06-04 16:22:32,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195518427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:32,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:32,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:32,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403639893] [2024-06-04 16:22:32,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:32,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:32,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:32,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:32,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:32,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:32,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 79 transitions, 772 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:32,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:32,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:32,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:33,101 INFO L124 PetriNetUnfolderBase]: 1341/2315 cut-off events. [2024-06-04 16:22:33,101 INFO L125 PetriNetUnfolderBase]: For 85132/85132 co-relation queries the response was YES. [2024-06-04 16:22:33,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14820 conditions, 2315 events. 1341/2315 cut-off events. For 85132/85132 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 14538 event pairs, 776 based on Foata normal form. 26/2339 useless extension candidates. Maximal degree in co-relation 14766. Up to 1981 conditions per place. [2024-06-04 16:22:33,115 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 43 selfloop transitions, 23 changer transitions 22/95 dead transitions. [2024-06-04 16:22:33,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 95 transitions, 1020 flow [2024-06-04 16:22:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-04 16:22:33,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-04 16:22:33,117 INFO L175 Difference]: Start difference. First operand has 126 places, 79 transitions, 772 flow. Second operand 9 states and 183 transitions. [2024-06-04 16:22:33,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 95 transitions, 1020 flow [2024-06-04 16:22:33,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 95 transitions, 925 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-04 16:22:33,199 INFO L231 Difference]: Finished difference. Result has 122 places, 71 transitions, 661 flow [2024-06-04 16:22:33,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=661, PETRI_PLACES=122, PETRI_TRANSITIONS=71} [2024-06-04 16:22:33,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-04 16:22:33,199 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 71 transitions, 661 flow [2024-06-04 16:22:33,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:33,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:33,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:33,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-04 16:22:33,200 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)] === [2024-06-04 16:22:33,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:33,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1451724265, now seen corresponding path program 62 times [2024-06-04 16:22:33,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:33,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158822956] [2024-06-04 16:22:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:33,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:33,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:33,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158822956] [2024-06-04 16:22:33,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158822956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:33,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:33,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:33,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118882412] [2024-06-04 16:22:33,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:33,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:33,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:33,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:33,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:33,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:33,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 71 transitions, 661 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:33,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:33,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:33,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:33,820 INFO L124 PetriNetUnfolderBase]: 1204/2074 cut-off events. [2024-06-04 16:22:33,821 INFO L125 PetriNetUnfolderBase]: For 67270/67270 co-relation queries the response was YES. [2024-06-04 16:22:33,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12340 conditions, 2074 events. 1204/2074 cut-off events. For 67270/67270 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 12743 event pairs, 650 based on Foata normal form. 24/2097 useless extension candidates. Maximal degree in co-relation 12289. Up to 1536 conditions per place. [2024-06-04 16:22:33,832 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 51 selfloop transitions, 23 changer transitions 10/91 dead transitions. [2024-06-04 16:22:33,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 91 transitions, 983 flow [2024-06-04 16:22:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-04 16:22:33,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:22:33,833 INFO L175 Difference]: Start difference. First operand has 122 places, 71 transitions, 661 flow. Second operand 9 states and 189 transitions. [2024-06-04 16:22:33,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 91 transitions, 983 flow [2024-06-04 16:22:33,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 91 transitions, 851 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-06-04 16:22:33,881 INFO L231 Difference]: Finished difference. Result has 107 places, 68 transitions, 565 flow [2024-06-04 16:22:33,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=565, PETRI_PLACES=107, PETRI_TRANSITIONS=68} [2024-06-04 16:22:33,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-04 16:22:33,882 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 68 transitions, 565 flow [2024-06-04 16:22:33,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:33,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:33,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:33,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-04 16:22:33,882 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)] === [2024-06-04 16:22:33,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1329102457, now seen corresponding path program 3 times [2024-06-04 16:22:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:33,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273337526] [2024-06-04 16:22:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:34,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:34,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273337526] [2024-06-04 16:22:34,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273337526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:34,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:34,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:34,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169777443] [2024-06-04 16:22:34,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:34,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:34,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:34,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:34,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 68 transitions, 565 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:34,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:34,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:34,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:34,466 INFO L124 PetriNetUnfolderBase]: 1058/1824 cut-off events. [2024-06-04 16:22:34,466 INFO L125 PetriNetUnfolderBase]: For 41481/41481 co-relation queries the response was YES. [2024-06-04 16:22:34,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9433 conditions, 1824 events. 1058/1824 cut-off events. For 41481/41481 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 10834 event pairs, 558 based on Foata normal form. 24/1847 useless extension candidates. Maximal degree in co-relation 9389. Up to 1091 conditions per place. [2024-06-04 16:22:34,475 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 21 changer transitions 10/87 dead transitions. [2024-06-04 16:22:34,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 87 transitions, 853 flow [2024-06-04 16:22:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:22:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:22:34,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-04 16:22:34,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-04 16:22:34,476 INFO L175 Difference]: Start difference. First operand has 107 places, 68 transitions, 565 flow. Second operand 8 states and 171 transitions. [2024-06-04 16:22:34,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 87 transitions, 853 flow [2024-06-04 16:22:34,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 87 transitions, 802 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:34,501 INFO L231 Difference]: Finished difference. Result has 104 places, 65 transitions, 522 flow [2024-06-04 16:22:34,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=522, PETRI_PLACES=104, PETRI_TRANSITIONS=65} [2024-06-04 16:22:34,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-04 16:22:34,502 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 65 transitions, 522 flow [2024-06-04 16:22:34,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:34,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:34,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:34,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-04 16:22:34,502 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)] === [2024-06-04 16:22:34,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1341482617, now seen corresponding path program 4 times [2024-06-04 16:22:34,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:34,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651037106] [2024-06-04 16:22:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:34,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:34,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:34,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651037106] [2024-06-04 16:22:34,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651037106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:34,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:34,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:34,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349324267] [2024-06-04 16:22:34,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:34,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:34,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:34,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:34,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:34,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 65 transitions, 522 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:34,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:34,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:34,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:35,053 INFO L124 PetriNetUnfolderBase]: 907/1567 cut-off events. [2024-06-04 16:22:35,053 INFO L125 PetriNetUnfolderBase]: For 32739/32739 co-relation queries the response was YES. [2024-06-04 16:22:35,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7856 conditions, 1567 events. 907/1567 cut-off events. For 32739/32739 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9040 event pairs, 513 based on Foata normal form. 26/1592 useless extension candidates. Maximal degree in co-relation 7813. Up to 1302 conditions per place. [2024-06-04 16:22:35,061 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 17 changer transitions 13/77 dead transitions. [2024-06-04 16:22:35,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 77 transitions, 710 flow [2024-06-04 16:22:35,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:22:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:22:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-04 16:22:35,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-04 16:22:35,062 INFO L175 Difference]: Start difference. First operand has 104 places, 65 transitions, 522 flow. Second operand 8 states and 166 transitions. [2024-06-04 16:22:35,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 77 transitions, 710 flow [2024-06-04 16:22:35,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 77 transitions, 662 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:22:35,081 INFO L231 Difference]: Finished difference. Result has 102 places, 60 transitions, 468 flow [2024-06-04 16:22:35,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=468, PETRI_PLACES=102, PETRI_TRANSITIONS=60} [2024-06-04 16:22:35,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-04 16:22:35,081 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 60 transitions, 468 flow [2024-06-04 16:22:35,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:35,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:35,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:35,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-04 16:22:35,082 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)] === [2024-06-04 16:22:35,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:35,082 INFO L85 PathProgramCache]: Analyzing trace with hash 35205301, now seen corresponding path program 5 times [2024-06-04 16:22:35,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:35,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909782290] [2024-06-04 16:22:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:35,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:35,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:35,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909782290] [2024-06-04 16:22:35,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909782290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:35,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:35,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:35,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035842067] [2024-06-04 16:22:35,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:35,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:35,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:35,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:35,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:35,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:35,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 60 transitions, 468 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:35,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:35,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:35,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:35,654 INFO L124 PetriNetUnfolderBase]: 777/1361 cut-off events. [2024-06-04 16:22:35,654 INFO L125 PetriNetUnfolderBase]: For 24419/24419 co-relation queries the response was YES. [2024-06-04 16:22:35,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6531 conditions, 1361 events. 777/1361 cut-off events. For 24419/24419 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7695 event pairs, 373 based on Foata normal form. 24/1384 useless extension candidates. Maximal degree in co-relation 6489. Up to 602 conditions per place. [2024-06-04 16:22:35,660 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 15 changer transitions 16/84 dead transitions. [2024-06-04 16:22:35,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 84 transitions, 772 flow [2024-06-04 16:22:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-04 16:22:35,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-04 16:22:35,661 INFO L175 Difference]: Start difference. First operand has 102 places, 60 transitions, 468 flow. Second operand 9 states and 190 transitions. [2024-06-04 16:22:35,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 84 transitions, 772 flow [2024-06-04 16:22:35,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 84 transitions, 726 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:35,677 INFO L231 Difference]: Finished difference. Result has 98 places, 56 transitions, 415 flow [2024-06-04 16:22:35,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=415, PETRI_PLACES=98, PETRI_TRANSITIONS=56} [2024-06-04 16:22:35,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-04 16:22:35,678 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 56 transitions, 415 flow [2024-06-04 16:22:35,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:35,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:35,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:35,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-04 16:22:35,678 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:35,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:35,679 INFO L85 PathProgramCache]: Analyzing trace with hash -819965771, now seen corresponding path program 6 times [2024-06-04 16:22:35,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:35,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691549739] [2024-06-04 16:22:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:35,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:35,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:35,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691549739] [2024-06-04 16:22:35,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691549739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:35,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:35,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:35,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957721259] [2024-06-04 16:22:35,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:35,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:35,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:35,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:36,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:36,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 56 transitions, 415 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:36,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:36,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:36,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:36,184 INFO L124 PetriNetUnfolderBase]: 598/1044 cut-off events. [2024-06-04 16:22:36,184 INFO L125 PetriNetUnfolderBase]: For 15951/15951 co-relation queries the response was YES. [2024-06-04 16:22:36,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4773 conditions, 1044 events. 598/1044 cut-off events. For 15951/15951 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5436 event pairs, 328 based on Foata normal form. 26/1069 useless extension candidates. Maximal degree in co-relation 4733. Up to 813 conditions per place. [2024-06-04 16:22:36,189 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 36 selfloop transitions, 10 changer transitions 16/69 dead transitions. [2024-06-04 16:22:36,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 69 transitions, 589 flow [2024-06-04 16:22:36,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-04 16:22:36,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-04 16:22:36,190 INFO L175 Difference]: Start difference. First operand has 98 places, 56 transitions, 415 flow. Second operand 9 states and 178 transitions. [2024-06-04 16:22:36,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 69 transitions, 589 flow [2024-06-04 16:22:36,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 69 transitions, 547 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-04 16:22:36,198 INFO L231 Difference]: Finished difference. Result has 92 places, 50 transitions, 346 flow [2024-06-04 16:22:36,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=346, PETRI_PLACES=92, PETRI_TRANSITIONS=50} [2024-06-04 16:22:36,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-04 16:22:36,199 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 50 transitions, 346 flow [2024-06-04 16:22:36,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:36,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:36,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:36,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-04 16:22:36,199 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:36,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:36,200 INFO L85 PathProgramCache]: Analyzing trace with hash -927784373, now seen corresponding path program 7 times [2024-06-04 16:22:36,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:36,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94810473] [2024-06-04 16:22:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:36,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:36,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:36,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94810473] [2024-06-04 16:22:36,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94810473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:36,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:36,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:36,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081150872] [2024-06-04 16:22:36,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:36,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:36,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:36,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:36,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:36,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:36,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 50 transitions, 346 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:36,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:36,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:36,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:36,743 INFO L124 PetriNetUnfolderBase]: 561/993 cut-off events. [2024-06-04 16:22:36,743 INFO L125 PetriNetUnfolderBase]: For 11553/11553 co-relation queries the response was YES. [2024-06-04 16:22:36,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4342 conditions, 993 events. 561/993 cut-off events. For 11553/11553 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5210 event pairs, 233 based on Foata normal form. 18/1002 useless extension candidates. Maximal degree in co-relation 4305. Up to 742 conditions per place. [2024-06-04 16:22:36,747 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 39 selfloop transitions, 9 changer transitions 12/67 dead transitions. [2024-06-04 16:22:36,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 67 transitions, 540 flow [2024-06-04 16:22:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:22:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:22:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-04 16:22:36,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156794425087108 [2024-06-04 16:22:36,747 INFO L175 Difference]: Start difference. First operand has 92 places, 50 transitions, 346 flow. Second operand 7 states and 148 transitions. [2024-06-04 16:22:36,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 67 transitions, 540 flow [2024-06-04 16:22:36,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 67 transitions, 490 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:36,755 INFO L231 Difference]: Finished difference. Result has 82 places, 48 transitions, 306 flow [2024-06-04 16:22:36,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=82, PETRI_TRANSITIONS=48} [2024-06-04 16:22:36,755 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-04 16:22:36,755 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 48 transitions, 306 flow [2024-06-04 16:22:36,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:36,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:36,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:36,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-04 16:22:36,756 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:36,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:36,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1697366407, now seen corresponding path program 8 times [2024-06-04 16:22:36,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:36,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573235264] [2024-06-04 16:22:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:36,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:37,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:37,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573235264] [2024-06-04 16:22:37,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573235264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:37,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:37,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:37,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644565001] [2024-06-04 16:22:37,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:37,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:37,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:37,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:37,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:37,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:37,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 48 transitions, 306 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:37,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:37,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:37,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:37,286 INFO L124 PetriNetUnfolderBase]: 537/961 cut-off events. [2024-06-04 16:22:37,286 INFO L125 PetriNetUnfolderBase]: For 8381/8381 co-relation queries the response was YES. [2024-06-04 16:22:37,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3819 conditions, 961 events. 537/961 cut-off events. For 8381/8381 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5062 event pairs, 208 based on Foata normal form. 18/978 useless extension candidates. Maximal degree in co-relation 3785. Up to 290 conditions per place. [2024-06-04 16:22:37,289 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 9 changer transitions 9/71 dead transitions. [2024-06-04 16:22:37,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 71 transitions, 570 flow [2024-06-04 16:22:37,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:22:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:22:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-04 16:22:37,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:22:37,290 INFO L175 Difference]: Start difference. First operand has 82 places, 48 transitions, 306 flow. Second operand 7 states and 154 transitions. [2024-06-04 16:22:37,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 71 transitions, 570 flow [2024-06-04 16:22:37,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 71 transitions, 536 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:37,296 INFO L231 Difference]: Finished difference. Result has 79 places, 45 transitions, 272 flow [2024-06-04 16:22:37,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=272, PETRI_PLACES=79, PETRI_TRANSITIONS=45} [2024-06-04 16:22:37,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-04 16:22:37,297 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 45 transitions, 272 flow [2024-06-04 16:22:37,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:37,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:37,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:37,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-04 16:22:37,297 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:37,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:37,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1614794361, now seen corresponding path program 9 times [2024-06-04 16:22:37,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:37,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422972924] [2024-06-04 16:22:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:37,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:37,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:37,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422972924] [2024-06-04 16:22:37,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422972924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:37,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:37,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:37,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941851789] [2024-06-04 16:22:37,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:37,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:37,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:37,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:37,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:37,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:37,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 45 transitions, 272 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:37,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:37,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:37,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:37,796 INFO L124 PetriNetUnfolderBase]: 417/749 cut-off events. [2024-06-04 16:22:37,796 INFO L125 PetriNetUnfolderBase]: For 6613/6613 co-relation queries the response was YES. [2024-06-04 16:22:37,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 749 events. 417/749 cut-off events. For 6613/6613 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3665 event pairs, 192 based on Foata normal form. 24/772 useless extension candidates. Maximal degree in co-relation 2865. Up to 290 conditions per place. [2024-06-04 16:22:37,799 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 38 selfloop transitions, 8 changer transitions 10/63 dead transitions. [2024-06-04 16:22:37,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 63 transitions, 474 flow [2024-06-04 16:22:37,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:22:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:22:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-04 16:22:37,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 16:22:37,800 INFO L175 Difference]: Start difference. First operand has 79 places, 45 transitions, 272 flow. Second operand 8 states and 164 transitions. [2024-06-04 16:22:37,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 63 transitions, 474 flow [2024-06-04 16:22:37,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 63 transitions, 449 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:22:37,804 INFO L231 Difference]: Finished difference. Result has 78 places, 42 transitions, 241 flow [2024-06-04 16:22:37,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=241, PETRI_PLACES=78, PETRI_TRANSITIONS=42} [2024-06-04 16:22:37,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-04 16:22:37,804 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 42 transitions, 241 flow [2024-06-04 16:22:37,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:37,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:37,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:37,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-04 16:22:37,805 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:37,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:37,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1622412921, now seen corresponding path program 10 times [2024-06-04 16:22:37,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:37,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606421181] [2024-06-04 16:22:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:37,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:38,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:38,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606421181] [2024-06-04 16:22:38,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606421181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:38,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:38,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540048816] [2024-06-04 16:22:38,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:38,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:38,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:38,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:38,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:38,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:38,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 42 transitions, 241 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:38,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:38,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:38,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:38,311 INFO L124 PetriNetUnfolderBase]: 266/492 cut-off events. [2024-06-04 16:22:38,312 INFO L125 PetriNetUnfolderBase]: For 3926/3926 co-relation queries the response was YES. [2024-06-04 16:22:38,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 492 events. 266/492 cut-off events. For 3926/3926 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2155 event pairs, 147 based on Foata normal form. 26/517 useless extension candidates. Maximal degree in co-relation 1683. Up to 290 conditions per place. [2024-06-04 16:22:38,313 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 27 selfloop transitions, 2 changer transitions 16/52 dead transitions. [2024-06-04 16:22:38,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 52 transitions, 361 flow [2024-06-04 16:22:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:22:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:22:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-04 16:22:38,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-04 16:22:38,314 INFO L175 Difference]: Start difference. First operand has 78 places, 42 transitions, 241 flow. Second operand 7 states and 139 transitions. [2024-06-04 16:22:38,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 52 transitions, 361 flow [2024-06-04 16:22:38,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 52 transitions, 344 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:22:38,318 INFO L231 Difference]: Finished difference. Result has 74 places, 35 transitions, 171 flow [2024-06-04 16:22:38,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=171, PETRI_PLACES=74, PETRI_TRANSITIONS=35} [2024-06-04 16:22:38,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-04 16:22:38,318 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 35 transitions, 171 flow [2024-06-04 16:22:38,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:38,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:38,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:38,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-04 16:22:38,319 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:38,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:38,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1552862081, now seen corresponding path program 11 times [2024-06-04 16:22:38,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:38,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866010708] [2024-06-04 16:22:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:38,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:38,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:38,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866010708] [2024-06-04 16:22:38,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866010708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:38,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:38,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:38,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243747087] [2024-06-04 16:22:38,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:38,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:38,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:38,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:38,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:38,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:38,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 35 transitions, 171 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:38,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:38,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:38,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:38,765 INFO L124 PetriNetUnfolderBase]: 229/443 cut-off events. [2024-06-04 16:22:38,765 INFO L125 PetriNetUnfolderBase]: For 2702/2702 co-relation queries the response was YES. [2024-06-04 16:22:38,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1441 conditions, 443 events. 229/443 cut-off events. For 2702/2702 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1912 event pairs, 58 based on Foata normal form. 18/460 useless extension candidates. Maximal degree in co-relation 1411. Up to 207 conditions per place. [2024-06-04 16:22:38,766 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 26 selfloop transitions, 4 changer transitions 13/50 dead transitions. [2024-06-04 16:22:38,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 50 transitions, 307 flow [2024-06-04 16:22:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:22:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:22:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-04 16:22:38,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-04 16:22:38,767 INFO L175 Difference]: Start difference. First operand has 74 places, 35 transitions, 171 flow. Second operand 7 states and 140 transitions. [2024-06-04 16:22:38,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 50 transitions, 307 flow [2024-06-04 16:22:38,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 50 transitions, 293 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:22:38,769 INFO L231 Difference]: Finished difference. Result has 62 places, 32 transitions, 143 flow [2024-06-04 16:22:38,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=143, PETRI_PLACES=62, PETRI_TRANSITIONS=32} [2024-06-04 16:22:38,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-04 16:22:38,769 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 32 transitions, 143 flow [2024-06-04 16:22:38,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:38,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:38,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:38,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-04 16:22:38,770 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:38,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1729993601, now seen corresponding path program 12 times [2024-06-04 16:22:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:38,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33285483] [2024-06-04 16:22:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:38,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:39,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:39,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33285483] [2024-06-04 16:22:39,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33285483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:39,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:39,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:39,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788697801] [2024-06-04 16:22:39,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:39,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:39,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:39,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:39,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:39,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:39,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 32 transitions, 143 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:39,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:39,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:39,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:39,170 INFO L124 PetriNetUnfolderBase]: 185/363 cut-off events. [2024-06-04 16:22:39,171 INFO L125 PetriNetUnfolderBase]: For 1784/1784 co-relation queries the response was YES. [2024-06-04 16:22:39,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 363 events. 185/363 cut-off events. For 1784/1784 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1477 event pairs, 14 based on Foata normal form. 18/380 useless extension candidates. Maximal degree in co-relation 1141. Up to 171 conditions per place. [2024-06-04 16:22:39,172 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 26 selfloop transitions, 4 changer transitions 8/45 dead transitions. [2024-06-04 16:22:39,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 45 transitions, 261 flow [2024-06-04 16:22:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:22:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:22:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-04 16:22:39,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-04 16:22:39,172 INFO L175 Difference]: Start difference. First operand has 62 places, 32 transitions, 143 flow. Second operand 7 states and 136 transitions. [2024-06-04 16:22:39,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 45 transitions, 261 flow [2024-06-04 16:22:39,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 246 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:22:39,174 INFO L231 Difference]: Finished difference. Result has 58 places, 30 transitions, 123 flow [2024-06-04 16:22:39,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=123, PETRI_PLACES=58, PETRI_TRANSITIONS=30} [2024-06-04 16:22:39,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-04 16:22:39,174 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 30 transitions, 123 flow [2024-06-04 16:22:39,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:39,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:39,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:39,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-04 16:22:39,185 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:39,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:39,185 INFO L85 PathProgramCache]: Analyzing trace with hash -219632549, now seen corresponding path program 13 times [2024-06-04 16:22:39,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:39,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905059331] [2024-06-04 16:22:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:39,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:39,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:39,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905059331] [2024-06-04 16:22:39,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905059331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:39,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:39,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:39,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649878701] [2024-06-04 16:22:39,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:39,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:39,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:39,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:39,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:39,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:22:39,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 30 transitions, 123 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:39,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:39,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:22:39,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:39,640 INFO L124 PetriNetUnfolderBase]: 80/176 cut-off events. [2024-06-04 16:22:39,640 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2024-06-04 16:22:39,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 176 events. 80/176 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 504 event pairs, 2 based on Foata normal form. 18/193 useless extension candidates. Maximal degree in co-relation 508. Up to 96 conditions per place. [2024-06-04 16:22:39,641 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 0 selfloop transitions, 0 changer transitions 38/38 dead transitions. [2024-06-04 16:22:39,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 38 transitions, 193 flow [2024-06-04 16:22:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:22:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:22:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-04 16:22:39,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-04 16:22:39,642 INFO L175 Difference]: Start difference. First operand has 58 places, 30 transitions, 123 flow. Second operand 7 states and 130 transitions. [2024-06-04 16:22:39,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 38 transitions, 193 flow [2024-06-04 16:22:39,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 170 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-04 16:22:39,642 INFO L231 Difference]: Finished difference. Result has 51 places, 0 transitions, 0 flow [2024-06-04 16:22:39,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=51, PETRI_TRANSITIONS=0} [2024-06-04 16:22:39,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-04 16:22:39,643 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 0 transitions, 0 flow [2024-06-04 16:22:39,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:39,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-04 16:22:39,647 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-04 16:22:39,647 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-04 16:22:39,647 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-04 16:22:39,647 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-04 16:22:39,647 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-04 16:22:39,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-04 16:22:39,648 INFO L445 BasicCegarLoop]: Path program histogram: [62, 27, 18, 13, 11, 10, 9, 8, 6, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:39,650 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-04 16:22:39,656 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-04 16:22:39,659 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-04 16:22:39,659 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-04 16:22:39,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 04:22:39 BasicIcfg [2024-06-04 16:22:39,660 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-04 16:22:39,660 INFO L158 Benchmark]: Toolchain (without parser) took 455630.94ms. Allocated memory was 155.2MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 95.1MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 790.5MB. Max. memory is 16.1GB. [2024-06-04 16:22:39,660 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 155.2MB. Free memory was 116.9MB in the beginning and 116.9MB in the end (delta: 98.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-04 16:22:39,660 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 155.2MB. Free memory is still 111.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 16:22:39,661 INFO L158 Benchmark]: CACSL2BoogieTranslator took 587.78ms. Allocated memory is still 155.2MB. Free memory was 94.8MB in the beginning and 122.6MB in the end (delta: -27.8MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. [2024-06-04 16:22:39,661 INFO L158 Benchmark]: Boogie Procedure Inliner took 87.95ms. Allocated memory was 155.2MB in the beginning and 203.4MB in the end (delta: 48.2MB). Free memory was 122.5MB in the beginning and 171.2MB in the end (delta: -48.6MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2024-06-04 16:22:39,661 INFO L158 Benchmark]: Boogie Preprocessor took 68.99ms. Allocated memory is still 203.4MB. Free memory was 171.2MB in the beginning and 168.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-04 16:22:39,661 INFO L158 Benchmark]: RCFGBuilder took 520.41ms. Allocated memory is still 203.4MB. Free memory was 168.0MB in the beginning and 122.9MB in the end (delta: 45.1MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. [2024-06-04 16:22:39,661 INFO L158 Benchmark]: TraceAbstraction took 454358.84ms. Allocated memory was 203.4MB in the beginning and 2.5GB in the end (delta: 2.3GB). Free memory was 121.9MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 766.6MB. Max. memory is 16.1GB. [2024-06-04 16:22:39,662 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 155.2MB. Free memory was 116.9MB in the beginning and 116.9MB in the end (delta: 98.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 155.2MB. Free memory is still 111.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 587.78ms. Allocated memory is still 155.2MB. Free memory was 94.8MB in the beginning and 122.6MB in the end (delta: -27.8MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 87.95ms. Allocated memory was 155.2MB in the beginning and 203.4MB in the end (delta: 48.2MB). Free memory was 122.5MB in the beginning and 171.2MB in the end (delta: -48.6MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.99ms. Allocated memory is still 203.4MB. Free memory was 171.2MB in the beginning and 168.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 520.41ms. Allocated memory is still 203.4MB. Free memory was 168.0MB in the beginning and 122.9MB in the end (delta: 45.1MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. * TraceAbstraction took 454358.84ms. Allocated memory was 203.4MB in the beginning and 2.5GB in the end (delta: 2.3GB). Free memory was 121.9MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 766.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 780]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 782]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 783]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 66 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 454.3s, OverallIterations: 205, TraceHistogramMax: 1, PathProgramHistogramMax: 62, EmptinessCheckTime: 0.0s, AutomataDifference: 393.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16926 SdHoareTripleChecker+Valid, 30.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14426 mSDsluCounter, 3254 SdHoareTripleChecker+Invalid, 25.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2381 mSDsCounter, 2427 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 69567 IncrementalHoareTripleChecker+Invalid, 71994 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2427 mSolverCounterUnsat, 873 mSDtfsCounter, 69567 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1712 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1631 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 10.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3766occurred in iteration=120, InterpolantAutomatonStates: 1681, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 58.7s InterpolantComputationTime, 4289 NumberOfCodeBlocks, 4289 NumberOfCodeBlocksAsserted, 205 NumberOfCheckSat, 4084 ConstructedInterpolants, 0 QuantifiedInterpolants, 46410 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 205 InterpolantComputations, 205 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-04 16:22:39,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE